#4090EC
Closest named color: Dark Sky Blue (#448EE4). oklch(64.8% 0.158 254), rgb(64, 144, 236).
Aa
Black text reads best on this color (6.41:1).
About this color
#4090EC is a medium-light, vivid blue. In OKLCH its lightness is 65%, its chroma 0.158 and its hue 254°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Sky Blue (#448EE4), ΔE 0.012 away. Black text reads best on it, at 6.41:1.
| Hue family | Blues |
| Lightness | medium-light (65%) |
| Chroma | vivid (0.158) |
| Temperature | cool |
| Nearest name | Dark Sky Blue (#448EE4) |
| Black text | 6.41:1 |
| White text | 3.27:1 |
Values
| HEX | #4090EC |
| RGB | rgb(64, 144, 236) |
| HSL | hsl(212, 82%, 59%) |
| OKLCH | oklch(64.8% 0.158 254) |
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 #4090EC | 3.27:1 | AA large text | Lc -65.1 | Content text, not long reading |
| Black text on #4090EC | 6.41:1 | AA | Lc 44.4 | Non-text elements, placeholder text |
| #4090EC text on white | 3.27:1 | AA large text | Lc 59.7 | Large or bold text, headings |
| #4090EC text on black | 6.41:1 | AA | Lc -42.0 | 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
#F1F6FC
oklch(97.1% 0.01 252.8)
-
Step 100
100
#E0EBF9
oklch(93.6% 0.022 254.4)
-
Step 200
200
#C6DBF6
oklch(88.4% 0.044 254.8)
-
Step 300
300
#9EC4F2
oklch(80.9% 0.077 253.5)
-
Step 400
400
#68A4EC
oklch(70.8% 0.123 253.8)
-
Step 500
500 (this color)
#4090EC
oklch(64.8% 0.158 254)
-
Step 600
600
#0C72D4
oklch(55.5% 0.172 254.1)
-
Step 700
700
#005FB6
oklch(49% 0.157 254.2)
-
Step 800
800
#054E95
oklch(42.7% 0.133 254.2)
-
Step 900
900
#124277
oklch(37.8% 0.104 254.1)
-
Step 950
950
#0C2745
oklch(27% 0.065 253.3)
#4090EC 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) | #6597F0 | 0.041 |
| Deuteranopia (no green cones) | #4A87EA | 0.023 |
| Tritanopia (no blue cones) | #00A6B2 | 0.123 |
| Achromatopsia (no color) | #8E8E8E | 0.158 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #4090EC
#4090EC
oklch(64.8% 0.158 254)
- #BF8000
#BF8000
oklch(64.8% 0.137 74.5)
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 #4090EC, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Sky Blue #448EE4 ΔE 0.012
- Chefchaouen Blue #4895EF ΔE 0.016
- Dodger Blue #1E90FF ΔE 0.032
- Soft Blue #6488EA ΔE 0.036
- Cornflower Blue #6495ED ΔE 0.037
- Water Blue #0E87CC ΔE 0.060
- Clear Blue #247AFD ΔE 0.070
- Cornflower #6A79F7 ΔE 0.070
Use #4090EC 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.