#0B3B4B
Closest named color: Midnight Green (#073B4C). oklch(33% 0.056 225.3), rgb(11, 59, 75).
Aa
White text reads best on this color (12.05:1).
About this color
#0B3B4B is a dark, muted teal or cyan. In OKLCH its lightness is 33%, its chroma 0.056 and its hue 225°. Its hue sits on the cool side of the wheel. The nearest named color is Midnight Green (#073B4C), ΔE 0.003 away. White text reads best on it, at 12.05:1.
| Hue family | Teals and cyans |
| Lightness | dark (33%) |
| Chroma | muted (0.056) |
| Temperature | cool |
| Nearest name | Midnight Green (#073B4C) |
| Black text | 1.74:1 |
| White text | 12.05:1 |
Values
| HEX | #0B3B4B |
| RGB | rgb(11, 59, 75) |
| HSL | hsl(195, 74%, 17%) |
| OKLCH | oklch(33% 0.056 225.3) |
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 #0B3B4B | 12.05:1 | AAA | Lc -100.9 | Preferred for body text |
| Black text on #0B3B4B | 1.74:1 | Fails | Lc 0.0 | Not readable |
| #0B3B4B text on white | 12.05:1 | AAA | Lc 97.3 | Preferred for body text |
| #0B3B4B text on black | 1.74:1 | 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
#F2F6F8
oklch(97.1% 0.005 228.8)
-
Step 100
100
#E2ECF0
oklch(93.7% 0.012 223.5)
-
Step 200
200
#CADDE5
oklch(88.6% 0.023 224.9)
-
Step 300
300
#A4C7D5
oklch(80.9% 0.042 224.1)
-
Step 400
400
#72AAC1
oklch(70.8% 0.067 225.7)
-
Step 500
500
#4894B1
oklch(63% 0.087 225.7)
-
Step 600
600
#247E9D
oklch(55.5% 0.094 225.9)
-
Step 700
700
#146A86
oklch(49% 0.087 225.9)
-
Step 800
800
#16576D
oklch(42.8% 0.072 225.4)
-
Step 900
900 (this color)
#0B3B4B
oklch(33% 0.056 225.3)
-
Step 950
950
#112A34
oklch(27% 0.036 226.6)
#0B3B4B 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) | #323A4C | 0.042 |
| Deuteranopia (no green cones) | #2A334B | 0.039 |
| Tritanopia (no blue cones) | #004040 | 0.031 |
| Achromatopsia (no color) | #363636 | 0.056 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #0B3B4B
#0B3B4B
oklch(33% 0.056 225.3)
- #4D2B1C
#4D2B1C
oklch(32.9% 0.056 44.2)
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 #0B3B4B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Midnight Green #073B4C ΔE 0.003
- Dark Blue Grey #1F3B4D ΔE 0.018
- Prussian Blue #1D3557 ΔE 0.036
- Gunmetal #293241 ΔE 0.039
- Onyx #343A40 ΔE 0.047
- Charcoal #264653 ΔE 0.047
- Space Cadet #2B2D42 ΔE 0.052
- Dark Grey Blue #29465B ΔE 0.054
Use #0B3B4B 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.