#0A479A
Closest named color: Cobalt (#1E488F). oklch(41.5% 0.148 258.6), rgb(10, 71, 154).
Aa
White text reads best on this color (8.82:1).
About this color
#0A479A is a dark, vivid blue. In OKLCH its lightness is 42%, its chroma 0.148 and its hue 259°. Its hue sits on the cool side of the wheel. The nearest named color is Cobalt (#1E488F), ΔE 0.021 away. White text reads best on it, at 8.82:1.
| Hue family | Blues |
| Lightness | dark (42%) |
| Chroma | vivid (0.148) |
| Temperature | cool |
| Nearest name | Cobalt (#1E488F) |
| Black text | 2.38:1 |
| White text | 8.82:1 |
Values
| HEX | #0A479A |
| RGB | rgb(10, 71, 154) |
| HSL | hsl(215, 88%, 32%) |
| OKLCH | oklch(41.5% 0.148 258.6) |
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 #0A479A | 8.82:1 | AAA | Lc -94.0 | Preferred for body text |
| Black text on #0A479A | 2.38:1 | Fails | Lc 14.5 | Not readable |
| #0A479A text on white | 8.82:1 | AAA | Lc 89.5 | Fine for body text |
| #0A479A text on black | 2.38:1 | Fails | Lc -12.7 | 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
#E0EBFB
oklch(93.7% 0.025 257.6)
-
Step 200
200
#C6DBF9
oklch(88.5% 0.047 257.3)
-
Step 300
300
#9FC2F9
oklch(80.8% 0.087 259.3)
-
Step 400
400
#69A1F6
oklch(70.7% 0.139 258.5)
-
Step 500
500
#3F86F2
oklch(63% 0.177 258.8)
-
Step 600
600
#1B6DE1
oklch(55.6% 0.193 258.7)
-
Step 700
700
#0B5AC3
oklch(49% 0.179 258.6)
-
Step 800
800 (this color)
#0A479A
oklch(41.5% 0.148 258.6)
-
Step 900
900
#153F7D
oklch(37.6% 0.115 258.6)
-
Step 950
950
#0E2649
oklch(27.1% 0.072 258)
#0A479A 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) | #02519D | 0.027 |
| Deuteranopia (no green cones) | #004498 | 0.010 |
| Tritanopia (no blue cones) | #005C69 | 0.113 |
| Achromatopsia (no color) | #4A4A4A | 0.148 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #0A479A
#0A479A
oklch(41.5% 0.148 258.6)
- #654500
#654500
oklch(41.6% 0.086 78.5)
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 #0A479A, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cobalt #1E488F ΔE 0.021
- Sapphire #2138AB ΔE 0.046
- Light Navy #155084 ΔE 0.048
- Dusk Blue #26538D ΔE 0.048
- Twilight Blue #0A437A ΔE 0.054
- Deep Sea Blue #015482 ΔE 0.058
- Blueberry #464196 ΔE 0.060
- Dark Slate Blue #483D8B ΔE 0.069
Use #0A479A 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.