#4183FF
Closest named color: Clear Blue (#247AFD). oklch(63.3% 0.197 261.6), rgb(65, 131, 255).
Aa
Black text reads best on this color (5.91:1).
About this color
#4183FF is a medium-light, vivid blue. In OKLCH its lightness is 63%, its chroma 0.197 and its hue 262°. Its hue sits on the cool side of the wheel. The nearest named color is Clear Blue (#247AFD), ΔE 0.032 away. Black text reads best on it, at 5.91:1.
| Hue family | Blues |
| Lightness | medium-light (63%) |
| Chroma | vivid (0.197) |
| Temperature | cool |
| Nearest name | Clear Blue (#247AFD) |
| Black text | 5.91:1 |
| White text | 3.55:1 |
Values
| HEX | #4183FF |
| RGB | rgb(65, 131, 255) |
| HSL | hsl(219, 100%, 63%) |
| OKLCH | oklch(63.3% 0.197 261.6) |
Contrast
WCAG 2 contrast ratios are the conformance target: AA needs 4.5:1 for body text and 3:1 for large text, AAA needs 7:1. APCA Lc values are supplementary guidance from the WCAG 3 drafts.
| Pair | WCAG 2 | Result | APCA | APCA guidance |
|---|---|---|---|---|
| White text on #4183FF | 3.55:1 | AA large text | Lc -68.1 | Content text, not long reading |
| Black text on #4183FF | 5.91:1 | AA | Lc 41.5 | Non-text elements, placeholder text |
| #4183FF text on white | 3.55:1 | AA large text | Lc 62.6 | Content text, not long reading |
| #4183FF text on black | 5.91:1 | AA | Lc -39.1 | Non-text elements, placeholder text |
Tints and shades
A 50–950 scale built in OKLCH: the hue is held, lightness follows a Tailwind v4-like curve, and every step is kept inside the sRGB gamut. This color sits at step 500.
-
Step 50
50
#F1F6FE
oklch(97.2% 0.012 259.8)
-
Step 100
100
#E0EAFD
oklch(93.5% 0.028 263.4)
-
Step 200
200
#C6DAFD
oklch(88.5% 0.053 261.7)
-
Step 300
300
#9EC1FF
oklch(80.8% 0.096 261.6)
-
Step 400
400
#6A9EFF
oklch(70.6% 0.153 261.9)
-
Step 500
500 (this color)
#4183FF
oklch(63.3% 0.197 261.6)
-
Step 600
600
#2068EE
oklch(55.7% 0.214 261.5)
-
Step 700
700
#1355CF
oklch(49.1% 0.199 261.6)
-
Step 800
800
#1346A7
oklch(42.6% 0.165 261.7)
-
Step 900
900
#173D84
oklch(37.8% 0.127 261.5)
-
Step 950
950
#0E244D
oklch(26.9% 0.081 261.5)
#4183FF with color blindness
Simulated with the Machado et al. (2009) model. ΔE is how far the color moves: below about 0.02 you would not notice a change.
| Vision | Seen as | Shift (ΔE) |
|---|---|---|
| Protanopia (no red cones) | #3A91FF | 0.035 |
| Deuteranopia (no green cones) | #0080FD | 0.030 |
| Tritanopia (no blue cones) | #00A1B5 | 0.155 |
| Achromatopsia (no color) | #888888 | 0.197 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #4183FF
#4183FF
oklch(63.3% 0.197 261.6)
- #B28000
#B28000
oklch(63.3% 0.131 81)
Analogous
Neighbouring hues, 30° either side.
Split complementary
The two hues beside the complement (150° and 210°).
Triadic
Three hues spaced 120° apart.
Palettes with this color
Curated palettes that contain a color within ΔE 0.04 (OKLab) of #4183FF, closest first.
No curated palette has a color within ΔE 0.04 of #4183FF.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Clear Blue #247AFD ΔE 0.032
- Dodger Blue #1E90FF ΔE 0.034
- Cornflower #6A79F7 ΔE 0.045
- Soft Blue #6488EA ΔE 0.049
- Dark Sky Blue #448EE4 ΔE 0.053
- Chefchaouen Blue #4895EF ΔE 0.057
- Cornflower Blue #6495ED ΔE 0.069
- Cerulean Blue #056EEE ΔE 0.070
Use #4183FF in your product
Turn it into light and dark UI roles checked for contrast, then export to Tailwind v4, shadcn/ui, CSS or design tokens.