#0A4890
Closest named color: Cobalt (#1E488F). oklch(41% 0.133 256.3), rgb(10, 72, 144).
Aa
White text reads best on this color (8.96:1).
About this color
#0A4890 is a dark, moderately saturated blue. In OKLCH its lightness is 41%, its chroma 0.133 and its hue 256°. Its hue sits on the cool side of the wheel. The nearest named color is Cobalt (#1E488F), ΔE 0.012 away. White text reads best on it, at 8.96:1.
| Hue family | Blues |
| Lightness | dark (41%) |
| Chroma | moderately saturated (0.133) |
| Temperature | cool |
| Nearest name | Cobalt (#1E488F) |
| Black text | 2.34:1 |
| White text | 8.96:1 |
Values
| HEX | #0A4890 |
| RGB | rgb(10, 72, 144) |
| HSL | hsl(212, 87%, 30%) |
| OKLCH | oklch(41% 0.133 256.3) |
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 #0A4890 | 8.96:1 | AAA | Lc -94.5 | Preferred for body text |
| Black text on #0A4890 | 2.34:1 | Fails | Lc 14.0 | Not readable |
| #0A4890 text on white | 8.96:1 | AAA | Lc 90.0 | Fine for body text |
| #0A4890 text on black | 2.34:1 | Fails | Lc -12.3 | 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
#F1F6FD
oklch(97.1% 0.011 256.7)
-
Step 100
100
#E0EBF9
oklch(93.6% 0.022 254.4)
-
Step 200
200
#C7DBF6
oklch(88.5% 0.043 255.9)
-
Step 300
300
#A0C3F3
oklch(80.9% 0.078 256.4)
-
Step 400
400
#6CA2ED
oklch(70.6% 0.125 256.8)
-
Step 500
500
#4289E7
oklch(63.1% 0.159 256.4)
-
Step 600
600
#1E71D5
oklch(55.6% 0.172 256.2)
-
Step 700
700
#0F5EB9
oklch(49.2% 0.16 256.3)
-
Step 800
800 (this color)
#0A4890
oklch(41% 0.133 256.3)
-
Step 900
900
#174177
oklch(37.7% 0.103 256.3)
-
Step 950
950
#0F2646
oklch(26.9% 0.066 257.2)
#0A4890 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) | #1C4F93 | 0.024 |
| Deuteranopia (no green cones) | #00448F | 0.013 |
| Tritanopia (no blue cones) | #005A65 | 0.101 |
| Achromatopsia (no color) | #494949 | 0.133 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #0A4890
#0A4890
oklch(41% 0.133 256.3)
- #644300
#644300
oklch(41% 0.086 77)
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 #0A4890, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cobalt #1E488F ΔE 0.012
- Light Navy #155084 ΔE 0.034
- Twilight Blue #0A437A ΔE 0.038
- Dusk Blue #26538D ΔE 0.040
- Deep Sea Blue #015482 ΔE 0.045
- Sapphire #2138AB ΔE 0.060
- Blueberry #464196 ΔE 0.062
- Light Navy Blue #2E5A88 ΔE 0.066
Use #0A4890 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.