#0A4A89
Closest named color: Cobalt (#1E488F). oklch(40.9% 0.121 253.5), rgb(10, 74, 137).
Aa
White text reads best on this color (8.92:1).
About this color
#0A4A89 is a dark, moderately saturated blue. In OKLCH its lightness is 41%, its chroma 0.121 and its hue 253°. Its hue sits on the cool side of the wheel. The nearest named color is Cobalt (#1E488F), ΔE 0.017 away. White text reads best on it, at 8.92:1.
| Hue family | Blues |
| Lightness | dark (41%) |
| Chroma | moderately saturated (0.121) |
| Temperature | cool |
| Nearest name | Cobalt (#1E488F) |
| Black text | 2.35:1 |
| White text | 8.92:1 |
Values
| HEX | #0A4A89 |
| RGB | rgb(10, 74, 137) |
| HSL | hsl(210, 86%, 29%) |
| OKLCH | oklch(40.9% 0.121 253.5) |
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 #0A4A89 | 8.92:1 | AAA | Lc -94.4 | Preferred for body text |
| Black text on #0A4A89 | 2.35:1 | Fails | Lc 14.1 | Not readable |
| #0A4A89 text on white | 8.92:1 | AAA | Lc 89.9 | Fine for body text |
| #0A4A89 text on black | 2.35:1 | 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
#F1F6FC
oklch(97.1% 0.01 252.8)
-
Step 100
100
#E1EBF8
oklch(93.6% 0.021 254.9)
-
Step 200
200
#C8DBF3
oklch(88.5% 0.039 254.3)
-
Step 300
300
#A1C4EE
oklch(80.9% 0.071 253.2)
-
Step 400
400
#6DA4E5
oklch(70.7% 0.112 253.4)
-
Step 500
500
#438BDE
oklch(63% 0.145 253.8)
-
Step 600
600
#1F74CC
oklch(55.7% 0.157 253.5)
-
Step 700
700
#0F61B0
oklch(49.2% 0.145 253.3)
-
Step 800
800 (this color)
#0A4A89
oklch(40.9% 0.121 253.5)
-
Step 900
900
#174272
oklch(37.6% 0.095 253.7)
-
Step 950
950
#0F2743
oklch(27% 0.06 253.9)
#0A4A89 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) | #284F8B | 0.027 |
| Deuteranopia (no green cones) | #0A4588 | 0.014 |
| Tritanopia (no blue cones) | #005962 | 0.090 |
| Achromatopsia (no color) | #4A4A4A | 0.121 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #0A4A89
#0A4A89
oklch(40.9% 0.121 253.5)
- #664100
#664100
oklch(40.8% 0.087 72.9)
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 #0A4A89, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cobalt #1E488F ΔE 0.017
- Light Navy #155084 ΔE 0.022
- Twilight Blue #0A437A ΔE 0.031
- Deep Sea Blue #015482 ΔE 0.034
- Dusk Blue #26538D ΔE 0.035
- Light Navy Blue #2E5A88 ΔE 0.058
- Blueberry #464196 ΔE 0.067
- Dark Slate Blue #483D8B ΔE 0.069
Use #0A4A89 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.