#4281E2
Closest named color: Dark Sky Blue (#448EE4). oklch(61% 0.161 258.9), rgb(66, 129, 226).
Aa
Black text reads best on this color (5.46:1).
About this color
#4281E2 is a medium-dark, vivid blue. In OKLCH its lightness is 61%, its chroma 0.161 and its hue 259°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Sky Blue (#448EE4), ΔE 0.035 away. Black text reads best on it, at 5.46:1.
| Hue family | Blues |
| Lightness | medium-dark (61%) |
| Chroma | vivid (0.161) |
| Temperature | cool |
| Nearest name | Dark Sky Blue (#448EE4) |
| Black text | 5.46:1 |
| White text | 3.83:1 |
Values
| HEX | #4281E2 |
| RGB | rgb(66, 129, 226) |
| HSL | hsl(216, 73%, 57%) |
| OKLCH | oklch(61% 0.161 258.9) |
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 #4281E2 | 3.83:1 | AA large text | Lc -71.0 | Content text, not long reading |
| Black text on #4281E2 | 5.46:1 | AA | Lc 38.5 | Non-text elements, placeholder text |
| #4281E2 text on white | 3.83:1 | AA large text | Lc 65.5 | Content text, not long reading |
| #4281E2 text on black | 5.46:1 | AA | Lc -36.1 | 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
#F1F6FD
oklch(97.1% 0.011 256.7)
-
Step 100
100
#E1EBFA
oklch(93.7% 0.023 258.4)
-
Step 200
200
#C8DAF7
oklch(88.4% 0.045 259.9)
-
Step 300
300
#A2C2F4
oklch(80.8% 0.079 259.2)
-
Step 400
400
#6FA1EF
oklch(70.7% 0.127 259)
-
Step 500
500 (this color)
#4281E2
oklch(61% 0.161 258.9)
-
Step 600
600
#296FD7
oklch(55.6% 0.174 258.7)
-
Step 700
700
#1C5CBB
oklch(49.1% 0.163 258.9)
-
Step 800
800
#194C97
oklch(42.8% 0.134 258.6)
-
Step 900
900
#1B4078
oklch(37.7% 0.105 258.7)
-
Step 950
950
#112646
oklch(27% 0.066 258.6)
#4281E2 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) | #528AE6 | 0.030 |
| Deuteranopia (no green cones) | #357BE0 | 0.021 |
| Tritanopia (no blue cones) | #0098A6 | 0.129 |
| Achromatopsia (no color) | #828282 | 0.161 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #4281E2
#4281E2
oklch(61% 0.161 258.9)
- #AC7800
#AC7800
oklch(61% 0.127 78.4)
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 #4281E2, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Sky Blue #448EE4 ΔE 0.035
- Soft Blue #6488EA ΔE 0.043
- Water Blue #0E87CC ΔE 0.048
- Clear Blue #247AFD ΔE 0.051
- Dodger Blue #1E90FF ΔE 0.054
- Chefchaouen Blue #4895EF ΔE 0.055
- Cornflower #6A79F7 ΔE 0.057
- Windows Blue #3778BF ΔE 0.058
Use #4281E2 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.