#0B3740
Closest named color: Midnight Green (#073B4C). oklch(31.2% 0.048 214.5), rgb(11, 55, 64).
Aa
White text reads best on this color (12.84:1).
About this color
#0B3740 is a dark, muted teal or cyan. In OKLCH its lightness is 31%, its chroma 0.048 and its hue 215°. Its hue sits on the cool side of the wheel. The nearest named color is Midnight Green (#073B4C), ΔE 0.022 away. White text reads best on it, at 12.84:1.
| Hue family | Teals and cyans |
| Lightness | dark (31%) |
| Chroma | muted (0.048) |
| Temperature | cool |
| Nearest name | Midnight Green (#073B4C) |
| Black text | 1.63:1 |
| White text | 12.84:1 |
Values
| HEX | #0B3740 |
| RGB | rgb(11, 55, 64) |
| HSL | hsl(190, 71%, 15%) |
| OKLCH | oklch(31.2% 0.048 214.5) |
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 #0B3740 | 12.84:1 | AAA | Lc -102.1 | Preferred for body text |
| Black text on #0B3740 | 1.63:1 | Fails | Lc 0.0 | Not readable |
| #0B3740 text on white | 12.84:1 | AAA | Lc 98.8 | Preferred for body text |
| #0B3740 text on black | 1.63:1 | 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
#DEEDF1
oklch(93.6% 0.017 215.5)
-
Step 200
200
#C2DFE6
oklch(88.5% 0.032 213.9)
-
Step 300
300
#96CBD8
oklch(81% 0.058 214.5)
-
Step 400
400
#53AFC4
oklch(70.6% 0.092 214.9)
-
Step 500
500
#009AB3
oklch(63.1% 0.111 214.6)
-
Step 600
600
#008197
oklch(55.5% 0.098 215.2)
-
Step 700
700
#006D7F
oklch(49.2% 0.087 214.3)
-
Step 800
800
#005968
oklch(42.7% 0.075 214.2)
-
Step 900
900
#004A57
oklch(37.6% 0.066 214.5)
-
Step 950
950 (this color)
#0B3740
oklch(31.2% 0.048 214.5)
#0B3740 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) | #313541 | 0.044 |
| Deuteranopia (no green cones) | #293040 | 0.038 |
| Tritanopia (no blue cones) | #003A3A | 0.019 |
| Achromatopsia (no color) | #323232 | 0.049 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #0B3740
#0B3740
oklch(31.2% 0.048 214.5)
- #462720
#462720
oklch(31.1% 0.049 33.5)
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 #0B3740, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Midnight Green #073B4C ΔE 0.022
- Dark Blue Grey #1F3B4D ΔE 0.033
- Gunmetal #293241 ΔE 0.035
- Space Cadet #2B2D42 ΔE 0.048
- Prussian Blue #1D3557 ΔE 0.049
- Onyx #343A40 ΔE 0.050
- Oxford Blue #1B263B ΔE 0.057
- Charcoal #264653 ΔE 0.064
Use #0B3740 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.