#0A4CB5
Closest named color: Blue Blue (#2242C7). oklch(44.9% 0.178 260.5), rgb(10, 76, 181).
Aa
White text reads best on this color (7.73:1).
About this color
#0A4CB5 is a dark, vivid blue. In OKLCH its lightness is 45%, its chroma 0.178 and its hue 260°. Its hue sits on the cool side of the wheel. The nearest named color is Blue Blue (#2242C7), ΔE 0.037 away. White text reads best on it, at 7.73:1.
| Hue family | Blues |
| Lightness | dark (45%) |
| Chroma | vivid (0.178) |
| Temperature | cool |
| Nearest name | Blue Blue (#2242C7) |
| Black text | 2.71:1 |
| White text | 7.73:1 |
Values
| HEX | #0A4CB5 |
| RGB | rgb(10, 76, 181) |
| HSL | hsl(217, 90%, 37%) |
| OKLCH | oklch(44.9% 0.178 260.5) |
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 #0A4CB5 | 7.73:1 | AAA | Lc -90.9 | Preferred for body text |
| Black text on #0A4CB5 | 2.71:1 | Fails | Lc 17.9 | Dividers and decoration only |
| #0A4CB5 text on white | 7.73:1 | AAA | Lc 86.1 | Fine for body text |
| #0A4CB5 text on black | 2.71:1 | Fails | Lc -16.0 | Dividers and decoration only |
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
#DFEBFF
oklch(93.7% 0.03 260.7)
-
Step 200
200
#C4DAFF
oklch(88.4% 0.057 260.8)
-
Step 300
300
#9DC2FF
oklch(81% 0.096 260.2)
-
Step 400
400
#679FFF
oklch(70.7% 0.153 260.6)
-
Step 500
500
#3B83FF
oklch(63.1% 0.198 260.5)
-
Step 600
600
#0366F7
oklch(55.7% 0.231 260.5)
-
Step 700
700
#0055D2
oklch(49.1% 0.205 260.4)
-
Step 800
800 (this color)
#0A4CB5
oklch(44.9% 0.178 260.5)
-
Step 900
900
#0E3C89
oklch(37.7% 0.138 260.5)
-
Step 950
950
#0A2450
oklch(27% 0.087 260.3)
#0A4CB5 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) | #005AB9 | 0.036 |
| Deuteranopia (no green cones) | #004CB3 | 0.005 |
| Tritanopia (no blue cones) | #006779 | 0.135 |
| Achromatopsia (no color) | #535353 | 0.178 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #0A4CB5
#0A4CB5
oklch(44.9% 0.178 260.5)
- #6F4E00
#6F4E00
oklch(44.8% 0.093 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 #0A4CB5, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Blue Blue #2242C7 ΔE 0.037
- Sapphire #2138AB ΔE 0.048
- Cobalt #1E488F ΔE 0.062
- Majorelle Blue #3F37C9 ΔE 0.064
- Dusk Blue #26538D ΔE 0.071
- Blueberry #464196 ΔE 0.074
- Blue With A Hint Of Purple #533CC6 ΔE 0.081
- Light Navy #155084 ΔE 0.082
Use #0A4CB5 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.