#0D212F
Closest named color: Rich Black (#0D1B2A). oklch(23.8% 0.037 241.2), rgb(13, 33, 47).
Aa
White text reads best on this color (16.46:1).
About this color
#0D212F is a very dark, muted blue. In OKLCH its lightness is 24%, its chroma 0.037 and its hue 241°. Its hue sits on the cool side of the wheel. The nearest named color is Rich Black (#0D1B2A), ΔE 0.022 away. White text reads best on it, at 16.46:1.
| Hue family | Blues |
| Lightness | very dark (24%) |
| Chroma | muted (0.037) |
| Temperature | cool |
| Nearest name | Rich Black (#0D1B2A) |
| Black text | 1.27:1 |
| White text | 16.46:1 |
Values
| HEX | #0D212F |
| RGB | rgb(13, 33, 47) |
| HSL | hsl(205, 57%, 12%) |
| OKLCH | oklch(23.8% 0.037 241.2) |
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 #0D212F | 16.46:1 | AAA | Lc -105.8 | Preferred for body text |
| Black text on #0D212F | 1.27:1 | Fails | Lc 0.0 | Not readable |
| #0D212F text on white | 16.46:1 | AAA | Lc 103.3 | Preferred for body text |
| #0D212F text on black | 1.27:1 | 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
#F2F6F9
oklch(97.1% 0.006 239.8)
-
Step 100
100
#E3EBF2
oklch(93.6% 0.013 244.3)
-
Step 200
200
#CBDCE8
oklch(88.5% 0.025 238.4)
-
Step 300
300
#A8C5DB
oklch(80.9% 0.044 240.9)
-
Step 400
400
#78A7C9
oklch(70.7% 0.071 240.4)
-
Step 500
500
#5490BB
oklch(63% 0.09 241.3)
-
Step 600
600
#367AA8
oklch(55.7% 0.099 241.3)
-
Step 700
700
#286690
oklch(49% 0.092 241.9)
-
Step 800
800
#235475
oklch(42.8% 0.076 241.2)
-
Step 900
900
#22455E
oklch(37.6% 0.059 241.7)
-
Step 950
950 (this color)
#0D212F
oklch(23.8% 0.037 241.2)
#0D212F 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) | #1B2130 | 0.020 |
| Deuteranopia (no green cones) | #161E2F | 0.015 |
| Tritanopia (no blue cones) | #002426 | 0.027 |
| Achromatopsia (no color) | #1F1F1F | 0.037 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #0D212F
#0D212F
oklch(23.8% 0.037 241.2)
- #2C1B0B
#2C1B0B
oklch(24% 0.038 62.6)
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 #0D212F, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rich Black #0D1B2A ΔE 0.022
- Dark #1B2431 ΔE 0.024
- Oxford Blue #1B263B ΔE 0.034
- Jet #212529 ΔE 0.037
- Rich Navy #001219 ΔE 0.071
- Space Cadet #2B2D42 ΔE 0.071
- Navy Blue #001146 ΔE 0.074
- Gunmetal #293241 ΔE 0.078
Use #0D212F 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.