#0B3E53
Closest named color: Midnight Green (#073B4C). oklch(34.2% 0.063 231), rgb(11, 62, 83).
Aa
White text reads best on this color (11.48:1).
About this color
#0B3E53 is a dark, muted blue. In OKLCH its lightness is 34%, its chroma 0.063 and its hue 231°. Its hue sits on the cool side of the wheel. The nearest named color is Midnight Green (#073B4C), ΔE 0.015 away. White text reads best on it, at 11.48:1.
| Hue family | Blues |
| Lightness | dark (34%) |
| Chroma | muted (0.063) |
| Temperature | cool |
| Nearest name | Midnight Green (#073B4C) |
| Black text | 1.82:1 |
| White text | 11.48:1 |
Values
| HEX | #0B3E53 |
| RGB | rgb(11, 62, 83) |
| HSL | hsl(197, 77%, 18%) |
| OKLCH | oklch(34.2% 0.063 231) |
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 #0B3E53 | 11.48:1 | AAA | Lc -99.9 | Preferred for body text |
| Black text on #0B3E53 | 1.82:1 | Fails | Lc 7.7 | Not readable |
| #0B3E53 text on white | 11.48:1 | AAA | Lc 96.1 | Preferred for body text |
| #0B3E53 text on black | 1.82:1 | Fails | Lc 0.0 | 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 900.
-
Step 50
50
#F1F6F9
oklch(97% 0.007 233.6)
-
Step 100
100
#E1ECF1
oklch(93.6% 0.014 226.6)
-
Step 200
200
#C9DDE7
oklch(88.6% 0.025 229.2)
-
Step 300
300
#A3C7DA
oklch(81% 0.047 231.1)
-
Step 400
400
#6EAAC7
oklch(70.8% 0.075 230.1)
-
Step 500
500
#4394B9
oklch(63.2% 0.096 230.7)
-
Step 600
600
#1A7DA5
oklch(55.5% 0.105 231.3)
-
Step 700
700
#076A8D
oklch(49.2% 0.096 230.4)
-
Step 800
800
#0F5673
oklch(42.6% 0.081 231.6)
-
Step 900
900 (this color)
#0B3E53
oklch(34.2% 0.063 231)
-
Step 950
950
#0F2A36
oklch(27% 0.04 229.8)
#0B3E53 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) | #333D54 | 0.042 |
| Deuteranopia (no green cones) | #2A3653 | 0.037 |
| Tritanopia (no blue cones) | #004445 | 0.037 |
| Achromatopsia (no color) | #393939 | 0.063 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #0B3E53
#0B3E53
oklch(34.2% 0.063 231)
- #522E18
#522E18
oklch(34.2% 0.063 50.8)
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 #0B3E53, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Midnight Green #073B4C ΔE 0.015
- Dark Blue Grey #1F3B4D ΔE 0.018
- Prussian Blue #1D3557 ΔE 0.034
- Charcoal #264653 ΔE 0.038
- Dark Grey Blue #29465B ΔE 0.042
- Gunmetal #293241 ΔE 0.048
- Marine Blue #01386A ΔE 0.049
- Onyx #343A40 ΔE 0.050
Use #0B3E53 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.