#4283FE
Closest named color: Clear Blue (#247AFD). oklch(63.3% 0.195 261.7), rgb(66, 131, 254).
Aa
Black text reads best on this color (5.90:1).
About this color
#4283FE is a medium-light, vivid blue. In OKLCH its lightness is 63%, its chroma 0.195 and its hue 262°. Its hue sits on the cool side of the wheel. The nearest named color is Clear Blue (#247AFD), ΔE 0.033 away. Black text reads best on it, at 5.90:1.
| Hue family | Blues |
| Lightness | medium-light (63%) |
| Chroma | vivid (0.195) |
| Temperature | cool |
| Nearest name | Clear Blue (#247AFD) |
| Black text | 5.90:1 |
| White text | 3.55:1 |
Values
| HEX | #4283FE |
| RGB | rgb(66, 131, 254) |
| HSL | hsl(219, 99%, 63%) |
| OKLCH | oklch(63.3% 0.195 261.7) |
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 #4283FE | 3.55:1 | AA large text | Lc -68.1 | Content text, not long reading |
| Black text on #4283FE | 5.90:1 | AA | Lc 41.4 | Non-text elements, placeholder text |
| #4283FE text on white | 3.55:1 | AA large text | Lc 62.7 | Content text, not long reading |
| #4283FE text on black | 5.90:1 | AA | Lc -39.0 | 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
#9FC1FF
oklch(80.9% 0.096 262.2)
-
Step 400
400
#6A9EFF
oklch(70.6% 0.153 261.9)
-
Step 500
500 (this color)
#4283FE
oklch(63.3% 0.195 261.7)
-
Step 600
600
#2268ED
oklch(55.7% 0.212 261.7)
-
Step 700
700
#1555CE
oklch(49.1% 0.198 261.7)
-
Step 800
800
#1447A6
oklch(42.7% 0.162 261.5)
-
Step 900
900
#173D84
oklch(37.8% 0.127 261.5)
-
Step 950
950
#0F244D
oklch(27% 0.081 262.1)
#4283FE 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) | #3B91FF | 0.035 |
| Deuteranopia (no green cones) | #0080FC | 0.031 |
| Tritanopia (no blue cones) | #00A0B4 | 0.153 |
| Achromatopsia (no color) | #888888 | 0.195 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #4283FE
#4283FE
oklch(63.3% 0.195 261.7)
- #B18000
#B18000
oklch(63.2% 0.13 81.5)
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 #4283FE, closest first.
No curated palette has a color within ΔE 0.04 of #4283FE.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Clear Blue #247AFD ΔE 0.033
- Dodger Blue #1E90FF ΔE 0.035
- Cornflower #6A79F7 ΔE 0.044
- Soft Blue #6488EA ΔE 0.048
- Dark Sky Blue #448EE4 ΔE 0.052
- Chefchaouen Blue #4895EF ΔE 0.056
- Cornflower Blue #6495ED ΔE 0.068
- Cerulean Blue #056EEE ΔE 0.070
Use #4283FE 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.