#4183FB
Closest named color: Clear Blue (#247AFD). oklch(63.1% 0.192 261.2), rgb(65, 131, 251).
Aa
Black text reads best on this color (5.86:1).
About this color
#4183FB is a medium-light, vivid blue. In OKLCH its lightness is 63%, its chroma 0.192 and its hue 261°. 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 5.86:1.
| Hue family | Blues |
| Lightness | medium-light (63%) |
| Chroma | vivid (0.192) |
| Temperature | cool |
| Nearest name | Clear Blue (#247AFD) |
| Black text | 5.86:1 |
| White text | 3.58:1 |
Values
| HEX | #4183FB |
| RGB | rgb(65, 131, 251) |
| HSL | hsl(219, 96%, 62%) |
| OKLCH | oklch(63.1% 0.192 261.2) |
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 #4183FB | 3.58:1 | AA large text | Lc -68.4 | Content text, not long reading |
| Black text on #4183FB | 5.86:1 | AA | Lc 41.1 | Non-text elements, placeholder text |
| #4183FB text on white | 3.58:1 | AA large text | Lc 62.9 | Content text, not long reading |
| #4183FB text on black | 5.86:1 | AA | Lc -38.7 | 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
#E0EBFD
oklch(93.7% 0.027 260.3)
-
Step 200
200
#C6DAFC
oklch(88.4% 0.052 261.1)
-
Step 300
300
#9FC1FE
oklch(80.8% 0.094 261.9)
-
Step 400
400
#6A9FFD
oklch(70.7% 0.149 261.1)
-
Step 500
500 (this color)
#4183FB
oklch(63.1% 0.192 261.2)
-
Step 600
600
#2169EA
oklch(55.6% 0.208 261.1)
-
Step 700
700
#1456CC
oklch(49.1% 0.194 261.3)
-
Step 800
800
#1347A5
oklch(42.6% 0.161 261.2)
-
Step 900
900
#173D83
oklch(37.7% 0.126 261.3)
-
Step 950
950
#0E244C
oklch(26.8% 0.079 261.2)
#4183FB 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) | #3F90FF | 0.033 |
| Deuteranopia (no green cones) | #007FF9 | 0.032 |
| Tritanopia (no blue cones) | #00A0B3 | 0.151 |
| Achromatopsia (no color) | #878787 | 0.192 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #4183FB
#4183FB
oklch(63.1% 0.192 261.2)
- #B17F00
#B17F00
oklch(63% 0.13 80.8)
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 #4183FB, closest first.
No curated palette has a color within ΔE 0.04 of #4183FB.
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 0.046
- Dark Sky Blue #448EE4 ΔE 0.049
- Chefchaouen Blue #4895EF ΔE 0.054
- Cornflower Blue #6495ED ΔE 0.067
- Cerulean Blue #056EEE ΔE 0.068
Use #4183FB 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.