#4290EA
Closest named color: Dark Sky Blue (#448EE4). oklch(64.8% 0.155 254), rgb(66, 144, 234).
Aa
Black text reads best on this color (6.40:1).
About this color
#4290EA is a medium-light, vivid blue. In OKLCH its lightness is 65%, its chroma 0.155 and its hue 254°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Sky Blue (#448EE4), ΔE 0.010 away. Black text reads best on it, at 6.40:1.
| Hue family | Blues |
| Lightness | medium-light (65%) |
| Chroma | vivid (0.155) |
| Temperature | cool |
| Nearest name | Dark Sky Blue (#448EE4) |
| Black text | 6.40:1 |
| White text | 3.27:1 |
Values
| HEX | #4290EA |
| RGB | rgb(66, 144, 234) |
| HSL | hsl(212, 80%, 59%) |
| OKLCH | oklch(64.8% 0.155 254) |
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 #4290EA | 3.27:1 | AA large text | Lc -65.2 | Content text, not long reading |
| Black text on #4290EA | 6.40:1 | AA | Lc 44.3 | Non-text elements, placeholder text |
| #4290EA text on white | 3.27:1 | AA large text | Lc 59.8 | Large or bold text, headings |
| #4290EA text on black | 6.40:1 | 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
#C7DBF5
oklch(88.5% 0.042 255)
-
Step 300
300
#9FC4F1
oklch(80.9% 0.075 253.6)
-
Step 400
400
#69A4EB
oklch(70.8% 0.122 253.9)
-
Step 500
500 (this color)
#4290EA
oklch(64.8% 0.155 254)
-
Step 600
600
#1273D2
oklch(55.7% 0.168 253.8)
-
Step 700
700
#005FB6
oklch(49% 0.157 254.2)
-
Step 800
800
#084E93
oklch(42.6% 0.13 254)
-
Step 900
900
#134275
oklch(37.7% 0.1 253.6)
-
Step 950
950
#0D2745
oklch(27% 0.064 254)
#4290EA 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) | #6696EE | 0.039 |
| Deuteranopia (no green cones) | #4C87E8 | 0.023 |
| Tritanopia (no blue cones) | #00A5B2 | 0.119 |
| Achromatopsia (no color) | #8E8E8E | 0.155 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #4290EA
#4290EA
oklch(64.8% 0.155 254)
- #BF7F00
#BF7F00
oklch(64.6% 0.137 73.8)
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 #4290EA, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Sky Blue #448EE4 ΔE 0.010
- Chefchaouen Blue #4895EF ΔE 0.016
- Soft Blue #6488EA ΔE 0.035
- Dodger Blue #1E90FF ΔE 0.035
- Cornflower Blue #6495ED ΔE 0.036
- Water Blue #0E87CC ΔE 0.059
- Cornflower #6A79F7 ΔE 0.071
- Clear Blue #247AFD ΔE 0.072
Use #4290EA 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.