#0B313B
Closest named color: Gunmetal (#293241). oklch(29.2% 0.045 219), rgb(11, 49, 59).
Aa
White text reads best on this color (13.84:1).
About this color
#0B313B is a dark, muted teal or cyan. In OKLCH its lightness is 29%, its chroma 0.045 and its hue 219°. Its hue sits on the cool side of the wheel. The nearest named color is Gunmetal (#293241), ΔE 0.038 away. White text reads best on it, at 13.84:1.
| Hue family | Teals and cyans |
| Lightness | dark (29%) |
| Chroma | muted (0.045) |
| Temperature | cool |
| Nearest name | Gunmetal (#293241) |
| Black text | 1.51:1 |
| White text | 13.84:1 |
Values
| HEX | #0B313B |
| RGB | rgb(11, 49, 59) |
| HSL | hsl(193, 69%, 14%) |
| OKLCH | oklch(29.2% 0.045 219) |
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 #0B313B | 13.84:1 | AAA | Lc -103.3 | Preferred for body text |
| Black text on #0B313B | 1.51:1 | Fails | Lc 0.0 | Not readable |
| #0B313B text on white | 13.84:1 | AAA | Lc 100.3 | Preferred for body text |
| #0B313B text on black | 1.51:1 | 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
#F0F7F9
oklch(97.1% 0.008 216.6)
-
Step 100
100
#DFEDF1
oklch(93.7% 0.016 216.7)
-
Step 200
200
#C5DEE7
oklch(88.5% 0.029 221.4)
-
Step 300
300
#9AC9D8
oklch(80.8% 0.054 219.4)
-
Step 400
400
#5DADC5
oklch(70.6% 0.086 219.7)
-
Step 500
500
#1998B6
oklch(63% 0.109 219.3)
-
Step 600
600
#00819B
oklch(55.7% 0.1 218.5)
-
Step 700
700
#006C83
oklch(49.1% 0.089 219.3)
-
Step 800
800
#00586C
oklch(42.6% 0.078 220.2)
-
Step 900
900
#004A5A
oklch(37.8% 0.068 218.5)
-
Step 950
950 (this color)
#0B313B
oklch(29.2% 0.045 219)
#0B313B 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) | #2B2F3C | 0.039 |
| Deuteranopia (no green cones) | #242B3B | 0.033 |
| Tritanopia (no blue cones) | #003434 | 0.021 |
| Achromatopsia (no color) | #2D2D2D | 0.045 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #0B313B
#0B313B
oklch(29.2% 0.045 219)
- #3F241B
#3F241B
oklch(29.3% 0.044 39.2)
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 #0B313B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Gunmetal #293241 ΔE 0.038
- Oxford Blue #1B263B ΔE 0.040
- Midnight Green #073B4C ΔE 0.040
- Space Cadet #2B2D42 ΔE 0.044
- Dark #1B2431 ΔE 0.045
- Jet #212529 ΔE 0.048
- Dark Blue Grey #1F3B4D ΔE 0.049
- Prussian Blue #1D3557 ΔE 0.056
Use #0B313B 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.