#0A4D90
Closest named color: Cobalt (#1E488F). oklch(42.1% 0.127 253.9), rgb(10, 77, 144).
Aa
White text reads best on this color (8.47:1).
About this color
#0A4D90 is a dark, moderately saturated blue. In OKLCH its lightness is 42%, its chroma 0.127 and its hue 254°. Its hue sits on the cool side of the wheel. The nearest named color is Cobalt (#1E488F), ΔE 0.016 away. White text reads best on it, at 8.47:1.
| Hue family | Blues |
| Lightness | dark (42%) |
| Chroma | moderately saturated (0.127) |
| Temperature | cool |
| Nearest name | Cobalt (#1E488F) |
| Black text | 2.47:1 |
| White text | 8.47:1 |
Values
| HEX | #0A4D90 |
| RGB | rgb(10, 77, 144) |
| HSL | hsl(210, 87%, 30%) |
| OKLCH | oklch(42.1% 0.127 253.9) |
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 #0A4D90 | 8.47:1 | AAA | Lc -93.2 | Preferred for body text |
| Black text on #0A4D90 | 2.47:1 | Fails | Lc 15.4 | Dividers and decoration only |
| #0A4D90 text on white | 8.47:1 | AAA | Lc 88.6 | Fine for body text |
| #0A4D90 text on black | 2.47:1 | Fails | Lc -13.6 | Not readable |
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 800.
-
Step 50
50
#F1F6FC
oklch(97.1% 0.01 252.8)
-
Step 100
100
#E0EBF8
oklch(93.6% 0.021 252.5)
-
Step 200
200
#C7DBF4
oklch(88.4% 0.041 254)
-
Step 300
300
#A0C4F0
oklch(81% 0.074 253.7)
-
Step 400
400
#6AA4E9
oklch(70.8% 0.119 253.6)
-
Step 500
500
#3F8BE2
oklch(63.1% 0.151 253.8)
-
Step 600
600
#1873D0
oklch(55.6% 0.164 253.9)
-
Step 700
700
#0560B4
oklch(49.1% 0.153 253.8)
-
Step 800
800 (this color)
#0A4D90
oklch(42.1% 0.127 253.9)
-
Step 900
900
#154274
oklch(37.7% 0.098 253.8)
-
Step 950
950
#0E2744
oklch(27% 0.062 253.9)
#0A4D90 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) | #285393 | 0.029 |
| Deuteranopia (no green cones) | #05488F | 0.015 |
| Tritanopia (no blue cones) | #005D67 | 0.094 |
| Achromatopsia (no color) | #4D4D4D | 0.127 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #0A4D90
#0A4D90
oklch(42.1% 0.127 253.9)
- #6A4500
#6A4500
oklch(42.2% 0.089 74.3)
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 #0A4D90, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cobalt #1E488F ΔE 0.016
- Light Navy #155084 ΔE 0.024
- Dusk Blue #26538D ΔE 0.028
- Deep Sea Blue #015482 ΔE 0.034
- Twilight Blue #0A437A ΔE 0.044
- Light Navy Blue #2E5A88 ΔE 0.052
- Denim Blue #3B5B92 ΔE 0.061
- Blueberry #464196 ΔE 0.064
Use #0A4D90 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.