#0B374F
Closest named color: Midnight Green (#073B4C). oklch(32.1% 0.063 237.9), rgb(11, 55, 79).
Aa
White text reads best on this color (12.54:1).
About this color
#0B374F is a dark, muted blue. In OKLCH its lightness is 32%, its chroma 0.063 and its hue 238°. Its hue sits on the cool side of the wheel. The nearest named color is Midnight Green (#073B4C), ΔE 0.016 away. White text reads best on it, at 12.54:1.
| Hue family | Blues |
| Lightness | dark (32%) |
| Chroma | muted (0.063) |
| Temperature | cool |
| Nearest name | Midnight Green (#073B4C) |
| Black text | 1.67:1 |
| White text | 12.54:1 |
Values
| HEX | #0B374F |
| RGB | rgb(11, 55, 79) |
| HSL | hsl(201, 76%, 18%) |
| OKLCH | oklch(32.1% 0.063 237.9) |
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 #0B374F | 12.54:1 | AAA | Lc -101.6 | Preferred for body text |
| Black text on #0B374F | 1.67:1 | Fails | Lc 0.0 | Not readable |
| #0B374F text on white | 12.54:1 | AAA | Lc 98.2 | Preferred for body text |
| #0B374F text on black | 1.67:1 | 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
#F0F7FB
oklch(97.2% 0.009 232.4)
-
Step 100
100
#DDECF7
oklch(93.5% 0.022 239.4)
-
Step 200
200
#C1DEF2
oklch(88.6% 0.041 238.1)
-
Step 300
300
#93C8EB
oklch(80.8% 0.074 237.8)
-
Step 400
400
#4EABE2
oklch(70.8% 0.119 237.7)
-
Step 500
500
#0093D3
oklch(63% 0.14 238.1)
-
Step 600
600
#007CB2
oklch(55.6% 0.123 237.7)
-
Step 700
700
#006897
oklch(49.1% 0.109 238.1)
-
Step 800
800
#00557C
oklch(42.7% 0.094 237.9)
-
Step 900
900
#004768
oklch(37.7% 0.083 237.5)
-
Step 950
950 (this color)
#0B374F
oklch(32.1% 0.063 237.9)
#0B374F 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) | #2C3750 | 0.036 |
| Deuteranopia (no green cones) | #22314F | 0.027 |
| Tritanopia (no blue cones) | #003D3F | 0.041 |
| Achromatopsia (no color) | #333333 | 0.063 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #0B374F
#0B374F
oklch(32.1% 0.063 237.9)
- #4A2A0E
#4A2A0E
oklch(32% 0.062 58.6)
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 #0B374F, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Midnight Green #073B4C ΔE 0.016
- Prussian Blue #1D3557 ΔE 0.024
- Dark Blue Grey #1F3B4D ΔE 0.024
- Gunmetal #293241 ΔE 0.037
- Space Cadet #2B2D42 ΔE 0.046
- Marine #042E60 ΔE 0.046
- Marine Blue #01386A ΔE 0.048
- Onyx #343A40 ΔE 0.055
Use #0B374F 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.