#00121E
Closest named color: Rich Navy (#001219). oklch(17.2% 0.037 236.5), rgb(0, 18, 30).
Aa
White text reads best on this color (18.99:1).
About this color
#00121E is a very dark, muted blue. In OKLCH its lightness is 17%, its chroma 0.037 and its hue 237°. Its hue sits on the cool side of the wheel. The nearest named color is Rich Navy (#001219), ΔE 0.011 away. White text reads best on it, at 18.99:1.
| Hue family | Blues |
| Lightness | very dark (17%) |
| Chroma | muted (0.037) |
| Temperature | cool |
| Nearest name | Rich Navy (#001219) |
| Black text | 1.10:1 |
| White text | 18.99:1 |
Values
| HEX | #00121E |
| RGB | rgb(0, 18, 30) |
| HSL | hsl(204, 100%, 6%) |
| OKLCH | oklch(17.2% 0.037 236.5) |
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 #00121E | 18.99:1 | AAA | Lc -107.3 | Preferred for body text |
| Black text on #00121E | 1.10:1 | Fails | Lc 0.0 | Not readable |
| #00121E text on white | 18.99:1 | AAA | Lc 105.3 | Preferred for body text |
| #00121E text on black | 1.10:1 | 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
#E2EBF1
oklch(93.5% 0.013 236.6)
-
Step 200
200
#CBDCE8
oklch(88.5% 0.025 238.4)
-
Step 300
300
#A6C6DA
oklch(81% 0.045 235.5)
-
Step 400
400
#75A8C7
oklch(70.7% 0.071 235.8)
-
Step 500
500
#4F92B9
oklch(63.2% 0.09 236.1)
-
Step 600
600
#2F7BA5
oklch(55.5% 0.098 236.7)
-
Step 700
700
#20688E
oklch(49.2% 0.092 236.5)
-
Step 800
800
#1E5573
oklch(42.8% 0.075 236.4)
-
Step 900
900
#1F465D
oklch(37.7% 0.059 237.1)
-
Step 950
950 (this color)
#00121E
oklch(17.2% 0.037 236.5)
#00121E 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) | #0C121F | 0.021 |
| Deuteranopia (no green cones) | #070F1E | 0.016 |
| Tritanopia (no blue cones) | #001516 | 0.024 |
| Achromatopsia (no color) | #101010 | 0.037 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #00121E
#00121E
oklch(17.2% 0.037 236.5)
- #1C0B01
#1C0B01
oklch(17.3% 0.038 57.6)
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 #00121E, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rich Navy #001219 ΔE 0.011
- Almost Black #070D0D ΔE 0.037
- Rich Black #0D1B2A ΔE 0.046
- Dark Navy #000435 ΔE 0.066
- Dark Navy Blue #00022E ΔE 0.066
- Midnight #03012D ΔE 0.068
- Very Dark Blue #000133 ΔE 0.072
- Navy Blue #001146 ΔE 0.080
Use #00121E 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.