#4280FB
Closest named color: Clear Blue (#247AFD). oklch(62.5% 0.195 262.2), rgb(66, 128, 251).
Aa
Black text reads best on this color (5.71:1).
About this color
#4280FB is a medium-light, vivid blue. In OKLCH its lightness is 62%, 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 0.027 away. Black text reads best on it, at 5.71:1.
| Hue family | Blues |
| Lightness | medium-light (62%) |
| Chroma | vivid (0.195) |
| Temperature | cool |
| Nearest name | Clear Blue (#247AFD) |
| Black text | 5.71:1 |
| White text | 3.67:1 |
Values
| HEX | #4280FB |
| RGB | rgb(66, 128, 251) |
| HSL | hsl(220, 96%, 62%) |
| OKLCH | oklch(62.5% 0.195 262.2) |
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 #4280FB | 3.67:1 | AA large text | Lc -69.4 | Content text, not long reading |
| Black text on #4280FB | 5.71:1 | AA | Lc 40.2 | Non-text elements, placeholder text |
| #4280FB text on white | 3.67:1 | AA large text | Lc 63.9 | Content text, not long reading |
| #4280FB text on black | 5.71:1 | AA | Lc -37.8 | 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
#6B9EFF
oklch(70.7% 0.153 262.2)
-
Step 500
500 (this color)
#4280FB
oklch(62.5% 0.195 262.2)
-
Step 600
600
#2667EC
oklch(55.5% 0.212 262.3)
-
Step 700
700
#1955CE
oklch(49.2% 0.197 262.2)
-
Step 800
800
#1746A6
oklch(42.6% 0.163 262.3)
-
Step 900
900
#193C84
oklch(37.6% 0.128 262.5)
-
Step 950
950
#0F244D
oklch(27% 0.081 262.1)
#4280FB 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) | #378EFF | 0.035 |
| Deuteranopia (no green cones) | #007DF9 | 0.032 |
| Tritanopia (no blue cones) | #009DB2 | 0.152 |
| Achromatopsia (no color) | #858585 | 0.195 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #4280FB
#4280FB
oklch(62.5% 0.195 262.2)
- #AE7E00
#AE7E00
oklch(62.4% 0.129 81.7)
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 #4280FB, closest first.
No curated palette has a color within ΔE 0.04 of #4280FB.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Clear Blue #247AFD ΔE 0.027
- Dodger Blue #1E90FF ΔE 0.041
- Cornflower #6A79F7 ΔE 0.042
- Soft Blue #6488EA ΔE 0.050
- Dark Sky Blue #448EE4 ΔE 0.054
- Chefchaouen Blue #4895EF ΔE 0.061
- Cerulean Blue #056EEE ΔE 0.063
- Royal Blue #4169E1 ΔE 0.067
Use #4280FB 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.