#00121D
Closest named color: Rich Navy (#001219). oklch(17.2% 0.036 234.2), rgb(0, 18, 29).
Aa
White text reads best on this color (19.01:1).
About this color
#00121D is a very dark, muted blue. In OKLCH its lightness is 17%, its chroma 0.036 and its hue 234°. Its hue sits on the cool side of the wheel. The nearest named color is Rich Navy (#001219), ΔE 0.009 away. White text reads best on it, at 19.01:1.
| Hue family | Blues |
| Lightness | very dark (17%) |
| Chroma | muted (0.036) |
| Temperature | cool |
| Nearest name | Rich Navy (#001219) |
| Black text | 1.10:1 |
| White text | 19.01:1 |
Values
| HEX | #00121D |
| RGB | rgb(0, 18, 29) |
| HSL | hsl(203, 100%, 6%) |
| OKLCH | oklch(17.2% 0.036 234.2) |
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 #00121D | 19.01:1 | AAA | Lc -107.3 | Preferred for body text |
| Black text on #00121D | 1.10:1 | Fails | Lc 0.0 | Not readable |
| #00121D text on white | 19.01:1 | AAA | Lc 105.3 | Preferred for body text |
| #00121D 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
#CBDCE7
oklch(88.5% 0.024 236)
-
Step 300
300
#A7C6D8
oklch(81% 0.042 233.5)
-
Step 400
400
#76A8C5
oklch(70.7% 0.068 234.5)
-
Step 500
500
#4F92B6
oklch(63% 0.087 234)
-
Step 600
600
#307CA2
oklch(55.6% 0.094 234)
-
Step 700
700
#21688B
oklch(49% 0.088 234.5)
-
Step 800
800
#1E5571
oklch(42.7% 0.073 234.5)
-
Step 900
900
#1F465B
oklch(37.6% 0.057 234.6)
-
Step 950
950 (this color)
#00121D
oklch(17.2% 0.036 234.2)
#00121D 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) | #0D121E | 0.023 |
| Deuteranopia (no green cones) | #080F1D | 0.017 |
| Tritanopia (no blue cones) | #001516 | 0.022 |
| Achromatopsia (no color) | #101010 | 0.036 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #00121D
#00121D
oklch(17.2% 0.036 234.2)
- #1C0B02
#1C0B02
oklch(17.3% 0.036 54)
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 #00121D, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rich Navy #001219 ΔE 0.009
- Almost Black #070D0D ΔE 0.035
- Rich Black #0D1B2A ΔE 0.047
- Dark Navy Blue #00022E ΔE 0.068
- Dark Navy #000435 ΔE 0.068
- Midnight #03012D ΔE 0.069
- Very Dark Blue #000133 ΔE 0.074
- Navy Blue #001146 ΔE 0.082
Use #00121D 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.