#0B2F37
Closest named color: Oxford Blue (#1B263B). oklch(28.4% 0.042 215.5), rgb(11, 47, 55).
Aa
White text reads best on this color (14.22:1).
About this color
#0B2F37 is a dark, muted teal or cyan. In OKLCH its lightness is 28%, its chroma 0.042 and its hue 215°. Its hue sits on the cool side of the wheel. The nearest named color is Oxford Blue (#1B263B), ΔE 0.037 away. White text reads best on it, at 14.22:1.
| Hue family | Teals and cyans |
| Lightness | dark (28%) |
| Chroma | muted (0.042) |
| Temperature | cool |
| Nearest name | Oxford Blue (#1B263B) |
| Black text | 1.47:1 |
| White text | 14.22:1 |
Values
| HEX | #0B2F37 |
| RGB | rgb(11, 47, 55) |
| HSL | hsl(191, 67%, 13%) |
| OKLCH | oklch(28.4% 0.042 215.5) |
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 #0B2F37 | 14.22:1 | AAA | Lc -103.8 | Preferred for body text |
| Black text on #0B2F37 | 1.47:1 | Fails | Lc 0.0 | Not readable |
| #0B2F37 text on white | 14.22:1 | AAA | Lc 100.8 | Preferred for body text |
| #0B2F37 text on black | 1.47:1 | 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 950.
-
Step 50
50
#F1F7F8
oklch(97.2% 0.007 208.8)
-
Step 100
100
#E0EDF0
oklch(93.7% 0.014 213.1)
-
Step 200
200
#C5DEE5
oklch(88.4% 0.028 216.4)
-
Step 300
300
#9CC9D5
oklch(80.8% 0.05 215.9)
-
Step 400
400
#61ADC0
oklch(70.6% 0.08 215.8)
-
Step 500
500
#2699B0
oklch(63.2% 0.102 214.8)
-
Step 600
600
#008197
oklch(55.5% 0.098 215.2)
-
Step 700
700
#006D80
oklch(49.2% 0.087 215.3)
-
Step 800
800
#005969
oklch(42.7% 0.076 215.4)
-
Step 900
900
#004A58
oklch(37.7% 0.067 215.8)
-
Step 950
950 (this color)
#0B2F37
oklch(28.4% 0.042 215.5)
#0B2F37 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) | #292D37 | 0.037 |
| Deuteranopia (no green cones) | #232937 | 0.033 |
| Tritanopia (no blue cones) | #003231 | 0.019 |
| Achromatopsia (no color) | #2B2B2B | 0.043 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #0B2F37
#0B2F37
oklch(28.4% 0.042 215.5)
- #3C221B
#3C221B
oklch(28.4% 0.042 35.8)
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 #0B2F37, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Oxford Blue #1B263B ΔE 0.037
- Dark #1B2431 ΔE 0.039
- Jet #212529 ΔE 0.041
- Gunmetal #293241 ΔE 0.043
- Space Cadet #2B2D42 ΔE 0.048
- Midnight Green #073B4C ΔE 0.049
- Dark Blue Grey #1F3B4D ΔE 0.058
- Prussian Blue #1D3557 ΔE 0.063
Use #0B2F37 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.