#0A4DB4
Closest named color: Blue Blue (#2242C7). oklch(45% 0.175 260.1), rgb(10, 77, 180).
Aa
White text reads best on this color (7.68:1).
About this color
#0A4DB4 is a medium-dark, vivid blue. In OKLCH its lightness is 45%, its chroma 0.175 and its hue 260°. Its hue sits on the cool side of the wheel. The nearest named color is Blue Blue (#2242C7), ΔE 0.040 away. White text reads best on it, at 7.68:1.
| Hue family | Blues |
| Lightness | medium-dark (45%) |
| Chroma | vivid (0.175) |
| Temperature | cool |
| Nearest name | Blue Blue (#2242C7) |
| Black text | 2.73:1 |
| White text | 7.68:1 |
Values
| HEX | #0A4DB4 |
| RGB | rgb(10, 77, 180) |
| HSL | hsl(216, 89%, 37%) |
| OKLCH | oklch(45% 0.175 260.1) |
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 #0A4DB4 | 7.68:1 | AAA | Lc -90.7 | Preferred for body text |
| Black text on #0A4DB4 | 2.73:1 | Fails | Lc 18.1 | Dividers and decoration only |
| #0A4DB4 text on white | 7.68:1 | AAA | Lc 85.9 | Fine for body text |
| #0A4DB4 text on black | 2.73:1 | Fails | Lc -16.1 | 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
#DFEBFE
oklch(93.7% 0.029 259.6)
-
Step 200
200
#C4DAFF
oklch(88.4% 0.057 260.8)
-
Step 300
300
#9DC2FF
oklch(81% 0.096 260.2)
-
Step 400
400
#669FFF
oklch(70.7% 0.154 260.3)
-
Step 500
500
#3983FF
oklch(63.1% 0.199 260.2)
-
Step 600
600
#0267F5
oklch(55.7% 0.227 260.1)
-
Step 700
700
#0056D0
oklch(49.2% 0.201 260.1)
-
Step 800
800 (this color)
#0A4DB4
oklch(45% 0.175 260.1)
-
Step 900
900
#0D3C88
oklch(37.6% 0.137 260.1)
-
Step 950
950
#0A2450
oklch(27% 0.087 260.3)
#0A4DB4 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) | #005BB8 | 0.036 |
| Deuteranopia (no green cones) | #004CB2 | 0.006 |
| Tritanopia (no blue cones) | #006779 | 0.132 |
| Achromatopsia (no color) | #535353 | 0.175 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #0A4DB4
#0A4DB4
oklch(45% 0.175 260.1)
- #704E00
#704E00
oklch(44.9% 0.093 79.7)
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 #0A4DB4, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Blue Blue #2242C7 ΔE 0.040
- Sapphire #2138AB ΔE 0.050
- Cobalt #1E488F ΔE 0.060
- Majorelle Blue #3F37C9 ΔE 0.067
- Dusk Blue #26538D ΔE 0.069
- Blueberry #464196 ΔE 0.074
- Light Navy #155084 ΔE 0.080
- Denim Blue #3B5B92 ΔE 0.081
Use #0A4DB4 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.