#09509C
Closest named color: Cobalt (#1E488F). oklch(43.7% 0.139 255.4), rgb(9, 80, 156).
Aa
White text reads best on this color (7.95:1).
About this color
#09509C is a dark, moderately saturated blue. In OKLCH its lightness is 44%, its chroma 0.139 and its hue 255°. 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 7.95:1.
| Hue family | Blues |
| Lightness | dark (44%) |
| Chroma | moderately saturated (0.139) |
| Temperature | cool |
| Nearest name | Cobalt (#1E488F) |
| Black text | 2.63:1 |
| White text | 7.95:1 |
Values
| HEX | #09509C |
| RGB | rgb(9, 80, 156) |
| HSL | hsl(211, 89%, 32%) |
| OKLCH | oklch(43.7% 0.139 255.4) |
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 #09509C | 7.95:1 | AAA | Lc -91.7 | Preferred for body text |
| Black text on #09509C | 2.63:1 | Fails | Lc 17.0 | Dividers and decoration only |
| #09509C text on white | 7.95:1 | AAA | Lc 87.0 | Fine for body text |
| #09509C text on black | 2.63:1 | 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
#67A3F0
oklch(70.7% 0.13 255.3)
-
Step 500
500
#3989EB
oklch(63% 0.167 255.4)
-
Step 600
600
#0A71DA
oklch(55.7% 0.181 255.3)
-
Step 700
700
#005EBA
oklch(49.1% 0.163 255.3)
-
Step 800
800 (this color)
#09509C
oklch(43.7% 0.139 255.4)
-
Step 900
900
#114179
oklch(37.7% 0.108 255.2)
-
Step 950
950
#0C2647
oklch(26.9% 0.069 255.8)
#09509C 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) | #23579F | 0.027 |
| Deuteranopia (no green cones) | #004B9B | 0.015 |
| Tritanopia (no blue cones) | #00636E | 0.106 |
| Achromatopsia (no color) | #515151 | 0.139 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #09509C
#09509C
oklch(43.7% 0.139 255.4)
- #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 #09509C, 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 0.032
- Light Navy #155084 ΔE 0.040
- Deep Sea Blue #015482 ΔE 0.047
- Light Navy Blue #2E5A88 ΔE 0.054
- Denim Blue #3B5B92 ΔE 0.057
- Blueberry #464196 ΔE 0.063
- Sapphire #2138AB ΔE 0.064
Use #09509C 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.