#0B5178
Closest named color: Deep Sea Blue (#015482). oklch(41.5% 0.091 240.5), rgb(11, 81, 120).
Aa
White text reads best on this color (8.52:1).
About this color
#0B5178 is a dark, moderately saturated blue. In OKLCH its lightness is 42%, its chroma 0.091 and its hue 240°. Its hue sits on the cool side of the wheel. The nearest named color is Deep Sea Blue (#015482), ΔE 0.017 away. White text reads best on it, at 8.52:1.
| Hue family | Blues |
| Lightness | dark (42%) |
| Chroma | moderately saturated (0.091) |
| Temperature | cool |
| Nearest name | Deep Sea Blue (#015482) |
| Black text | 2.46:1 |
| White text | 8.52:1 |
Values
| HEX | #0B5178 |
| RGB | rgb(11, 81, 120) |
| HSL | hsl(201, 83%, 26%) |
| OKLCH | oklch(41.5% 0.091 240.5) |
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 #0B5178 | 8.52:1 | AAA | Lc -93.5 | Preferred for body text |
| Black text on #0B5178 | 2.46:1 | Fails | Lc 15.1 | Dividers and decoration only |
| #0B5178 text on white | 8.52:1 | AAA | Lc 88.9 | Fine for body text |
| #0B5178 text on black | 2.46:1 | Fails | Lc -13.3 | 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
#F1F6FA
oklch(97.1% 0.008 241.7)
-
Step 100
100
#E1EBF3
oklch(93.5% 0.015 241.8)
-
Step 200
200
#C9DCEB
oklch(88.5% 0.029 241.6)
-
Step 300
300
#A3C6E0
oklch(81% 0.053 240.5)
-
Step 400
400
#6EA8D1
oklch(70.7% 0.085 240.3)
-
Step 500
500
#4491C4
oklch(63% 0.108 240.5)
-
Step 600
600
#1D7BB1
oklch(55.7% 0.118 240.2)
-
Step 700
700
#0B6798
oklch(49.1% 0.109 240.4)
-
Step 800
800 (this color)
#0B5178
oklch(41.5% 0.091 240.5)
-
Step 900
900
#184663
oklch(37.7% 0.07 240.2)
-
Step 950
950
#0F293A
oklch(26.9% 0.045 240)
#0B5178 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) | #3E527A | 0.045 |
| Deuteranopia (no green cones) | #304877 | 0.036 |
| Tritanopia (no blue cones) | #005B5F | 0.060 |
| Achromatopsia (no color) | #4C4C4C | 0.091 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #0B5178
#0B5178
oklch(41.5% 0.091 240.5)
- #6F3E0B
#6F3E0B
oklch(41.6% 0.091 60.1)
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 #0B5178, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Deep Sea Blue #015482 ΔE 0.017
- Light Navy #155084 ΔE 0.022
- Dusk Blue #26538D ΔE 0.041
- Twilight Blue #0A437A ΔE 0.044
- Light Navy Blue #2E5A88 ΔE 0.046
- Cobalt #1E488F ΔE 0.052
- Dark Grey Blue #29465B ΔE 0.053
- Petrol #005F6A ΔE 0.056
Use #0B5178 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.