#0B3447
Closest named color: Midnight Green (#073B4C). oklch(30.7% 0.055 233.2), rgb(11, 52, 71).
Aa
White text reads best on this color (13.15:1).
About this color
#0B3447 is a dark, muted blue. In OKLCH its lightness is 31%, its chroma 0.055 and its hue 233°. Its hue sits on the cool side of the wheel. The nearest named color is Midnight Green (#073B4C), ΔE 0.023 away. White text reads best on it, at 13.15:1.
| Hue family | Blues |
| Lightness | dark (31%) |
| Chroma | muted (0.055) |
| Temperature | cool |
| Nearest name | Midnight Green (#073B4C) |
| Black text | 1.59:1 |
| White text | 13.15:1 |
Values
| HEX | #0B3447 |
| RGB | rgb(11, 52, 71) |
| HSL | hsl(199, 73%, 16%) |
| OKLCH | oklch(30.7% 0.055 233.2) |
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 #0B3447 | 13.15:1 | AAA | Lc -102.5 | Preferred for body text |
| Black text on #0B3447 | 1.59:1 | Fails | Lc 0.0 | Not readable |
| #0B3447 text on white | 13.15:1 | AAA | Lc 99.2 | Preferred for body text |
| #0B3447 text on black | 1.59:1 | 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
#F0F7FA
oklch(97.2% 0.008 225.1)
-
Step 100
100
#DEECF5
oklch(93.5% 0.019 235.7)
-
Step 200
200
#C2DEEE
oklch(88.5% 0.037 232.9)
-
Step 300
300
#96C9E5
oklch(81% 0.066 232.7)
-
Step 400
400
#55ACD7
oklch(70.8% 0.105 232.4)
-
Step 500
500
#0095CB
oklch(63% 0.131 233.2)
-
Step 600
600
#007DAB
oklch(55.5% 0.115 233.2)
-
Step 700
700
#006991
oklch(49% 0.102 233.6)
-
Step 800
800
#005677
oklch(42.6% 0.088 233.1)
-
Step 900
900
#004864
oklch(37.8% 0.078 232.8)
-
Step 950
950 (this color)
#0B3447
oklch(30.7% 0.055 233.2)
#0B3447 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) | #2B3348 | 0.036 |
| Deuteranopia (no green cones) | #232E47 | 0.030 |
| Tritanopia (no blue cones) | #00393A | 0.034 |
| Achromatopsia (no color) | #303030 | 0.055 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #0B3447
#0B3447
oklch(30.7% 0.055 233.2)
- #452713
#452713
oklch(30.7% 0.055 52.9)
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 #0B3447, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Midnight Green #073B4C ΔE 0.023
- Dark Blue Grey #1F3B4D ΔE 0.033
- Gunmetal #293241 ΔE 0.033
- Prussian Blue #1D3557 ΔE 0.035
- Space Cadet #2B2D42 ΔE 0.040
- Oxford Blue #1B263B ΔE 0.047
- Marine #042E60 ΔE 0.053
- Onyx #343A40 ΔE 0.057
Use #0B3447 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.