#0D509C
Closest named color: Cobalt (#1E488F). oklch(43.8% 0.139 255.8), rgb(13, 80, 156).
Aa
White text reads best on this color (7.94:1).
About this color
#0D509C is a dark, moderately saturated blue. In OKLCH its lightness is 44%, its chroma 0.139 and its hue 256°. Its hue sits on the cool side of the wheel. The nearest named color is Cobalt (#1E488F), ΔE 0.029 away. White text reads best on it, at 7.94:1.
| Hue family | Blues |
| Lightness | dark (44%) |
| Chroma | moderately saturated (0.139) |
| Temperature | cool |
| Nearest name | Cobalt (#1E488F) |
| Black text | 2.64:1 |
| White text | 7.94:1 |
Values
| HEX | #0D509C |
| RGB | rgb(13, 80, 156) |
| HSL | hsl(212, 85%, 33%) |
| OKLCH | oklch(43.8% 0.139 255.8) |
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 #0D509C | 7.94:1 | AAA | Lc -91.7 | Preferred for body text |
| Black text on #0D509C | 2.64:1 | Fails | Lc 17.1 | Dividers and decoration only |
| #0D509C text on white | 7.94:1 | AAA | Lc 87.0 | Fine for body text |
| #0D509C text on black | 2.64:1 | Fails | Lc -15.1 | 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
#F1F6FD
oklch(97.1% 0.011 256.7)
-
Step 100
100
#E0EBFA
oklch(93.6% 0.024 256.1)
-
Step 200
200
#C6DBF7
oklch(88.5% 0.045 255.6)
-
Step 300
300
#9EC3F5
oklch(80.8% 0.082 256.1)
-
Step 400
400
#68A3F0
oklch(70.8% 0.129 255.6)
-
Step 500
500
#3B89EB
oklch(63.1% 0.166 255.8)
-
Step 600
600
#1170D9
oklch(55.5% 0.18 255.9)
-
Step 700
700
#005DBC
oklch(49% 0.167 256)
-
Step 800
800 (this color)
#0D509C
oklch(43.8% 0.139 255.8)
-
Step 900
900
#134179
oklch(37.7% 0.107 255.7)
-
Step 950
950
#0D2647
oklch(26.9% 0.069 256.4)
#0D509C 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) | #23589F | 0.028 |
| Deuteranopia (no green cones) | #004B9B | 0.016 |
| Tritanopia (no blue cones) | #00626E | 0.104 |
| Achromatopsia (no color) | #515151 | 0.139 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #0D509C
#0D509C
oklch(43.8% 0.139 255.8)
- #6F4900
#6F4900
oklch(43.7% 0.092 75)
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 #0D509C, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cobalt #1E488F ΔE 0.029
- Dusk Blue #26538D ΔE 0.031
- Light Navy #155084 ΔE 0.040
- Deep Sea Blue #015482 ΔE 0.047
- Light Navy Blue #2E5A88 ΔE 0.054
- Denim Blue #3B5B92 ΔE 0.056
- Blueberry #464196 ΔE 0.062
- Sapphire #2138AB ΔE 0.064
Use #0D509C 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.