#0A4AAB
Closest named color: Sapphire (#2138AB). oklch(43.6% 0.167 259.9), rgb(10, 74, 171).
Aa
White text reads best on this color (8.13:1).
About this color
#0A4AAB is a dark, vivid blue. In OKLCH its lightness is 44%, its chroma 0.167 and its hue 260°. Its hue sits on the cool side of the wheel. The nearest named color is Sapphire (#2138AB), ΔE 0.041 away. White text reads best on it, at 8.13:1.
| Hue family | Blues |
| Lightness | dark (44%) |
| Chroma | vivid (0.167) |
| Temperature | cool |
| Nearest name | Sapphire (#2138AB) |
| Black text | 2.58:1 |
| White text | 8.13:1 |
Values
| HEX | #0A4AAB |
| RGB | rgb(10, 74, 171) |
| HSL | hsl(216, 89%, 35%) |
| OKLCH | oklch(43.6% 0.167 259.9) |
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 #0A4AAB | 8.13:1 | AAA | Lc -92.1 | Preferred for body text |
| Black text on #0A4AAB | 2.58:1 | Fails | Lc 16.6 | Dividers and decoration only |
| #0A4AAB text on white | 8.13:1 | AAA | Lc 87.4 | Fine for body text |
| #0A4AAB text on black | 2.58:1 | Fails | Lc -14.7 | 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
#F0F6FF
oklch(97.1% 0.014 258.3)
-
Step 100
100
#DFEBFD
oklch(93.6% 0.028 258.4)
-
Step 200
200
#C5DAFE
oklch(88.4% 0.055 261.2)
-
Step 300
300
#9CC2FF
oklch(80.9% 0.096 259.7)
-
Step 400
400
#659FFF
oklch(70.6% 0.154 260)
-
Step 500
500
#3883FF
oklch(63% 0.199 260)
-
Step 600
600
#0E69EF
oklch(55.7% 0.217 259.9)
-
Step 700
700
#0056CF
oklch(49.1% 0.2 260)
-
Step 800
800 (this color)
#0A4AAB
oklch(43.6% 0.167 259.9)
-
Step 900
900
#113D85
oklch(37.7% 0.13 260.1)
-
Step 950
950
#0B254E
oklch(27.1% 0.082 259.4)
#0A4AAB 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) | #0057AE | 0.034 |
| Deuteranopia (no green cones) | #0049A9 | 0.006 |
| Tritanopia (no blue cones) | #006373 | 0.128 |
| Achromatopsia (no color) | #4F4F4F | 0.167 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #0A4AAB
#0A4AAB
oklch(43.6% 0.167 259.9)
- #6B4B00
#6B4B00
oklch(43.6% 0.09 80.5)
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 #0A4AAB, closest first.
No curated palette has a color within ΔE 0.04 of #0A4AAB.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Sapphire #2138AB ΔE 0.041
- Cobalt #1E488F ΔE 0.046
- Blue Blue #2242C7 ΔE 0.049
- Dusk Blue #26538D ΔE 0.060
- Blueberry #464196 ΔE 0.066
- Light Navy #155084 ΔE 0.068
- Majorelle Blue #3F37C9 ΔE 0.073
- Deep Sea Blue #015482 ΔE 0.076
Use #0A4AAB 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.