#0B3F4D
Closest named color: Midnight Green (#073B4C). oklch(34.2% 0.057 220.6), rgb(11, 63, 77).
Aa
White text reads best on this color (11.46:1).
About this color
#0B3F4D is a dark, muted teal or cyan. In OKLCH its lightness is 34%, its chroma 0.057 and its hue 221°. Its hue sits on the cool side of the wheel. The nearest named color is Midnight Green (#073B4C), ΔE 0.014 away. White text reads best on it, at 11.46:1.
| Hue family | Teals and cyans |
| Lightness | dark (34%) |
| Chroma | muted (0.057) |
| Temperature | cool |
| Nearest name | Midnight Green (#073B4C) |
| Black text | 1.83:1 |
| White text | 11.46:1 |
Values
| HEX | #0B3F4D |
| RGB | rgb(11, 63, 77) |
| HSL | hsl(193, 75%, 17%) |
| OKLCH | oklch(34.2% 0.057 220.6) |
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 #0B3F4D | 11.46:1 | AAA | Lc -99.8 | Preferred for body text |
| Black text on #0B3F4D | 1.83:1 | Fails | Lc 7.8 | Not readable |
| #0B3F4D text on white | 11.46:1 | AAA | Lc 96.1 | Preferred for body text |
| #0B3F4D text on black | 1.83:1 | 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
#F1F6F8
oklch(97% 0.006 223.5)
-
Step 100
100
#E1ECF0
oklch(93.6% 0.013 221.4)
-
Step 200
200
#C9DDE4
oklch(88.5% 0.023 220.8)
-
Step 300
300
#A3C8D4
oklch(81% 0.043 219.5)
-
Step 400
400
#6FABBE
oklch(70.7% 0.068 219.9)
-
Step 500
500
#4496AE
oklch(63.2% 0.087 219.9)
-
Step 600
600
#1B809A
oklch(55.7% 0.095 220.2)
-
Step 700
700
#076C83
oklch(49.2% 0.088 219.7)
-
Step 800
800
#0F586B
oklch(42.8% 0.073 220.6)
-
Step 900
900 (this color)
#0B3F4D
oklch(34.2% 0.057 220.6)
-
Step 950
950
#0F2A33
oklch(26.8% 0.037 222.6)
#0B3F4D 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) | #373D4E | 0.048 |
| Deuteranopia (no green cones) | #2E374D | 0.041 |
| Tritanopia (no blue cones) | #004343 | 0.026 |
| Achromatopsia (no color) | #3A3A3A | 0.057 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #0B3F4D
#0B3F4D
oklch(34.2% 0.057 220.6)
- #512E21
#512E21
oklch(34.2% 0.056 41)
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 #0B3F4D, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Midnight Green #073B4C ΔE 0.014
- Dark Blue Grey #1F3B4D ΔE 0.019
- Charcoal #264653 ΔE 0.036
- Prussian Blue #1D3557 ΔE 0.043
- Dark Grey Blue #29465B ΔE 0.044
- Onyx #343A40 ΔE 0.046
- Dark Teal #014D4E ΔE 0.047
- Gunmetal #293241 ΔE 0.047
Use #0B3F4D 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.