#000C21
Closest named color: Rich Navy (#001219). oklch(15.6% 0.05 254.4), rgb(0, 12, 33).
Aa
White text reads best on this color (19.54:1).
About this color
#000C21 is a very dark, muted blue. In OKLCH its lightness is 16%, its chroma 0.050 and its hue 254°. Its hue sits on the cool side of the wheel. The nearest named color is Rich Navy (#001219), ΔE 0.032 away. White text reads best on it, at 19.54:1.
| Hue family | Blues |
| Lightness | very dark (16%) |
| Chroma | muted (0.050) |
| Temperature | cool |
| Nearest name | Rich Navy (#001219) |
| Black text | 1.07:1 |
| White text | 19.54:1 |
Values
| HEX | #000C21 |
| RGB | rgb(0, 12, 33) |
| HSL | hsl(218, 100%, 6%) |
| OKLCH | oklch(15.6% 0.05 254.4) |
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 #000C21 | 19.54:1 | AAA | Lc -107.5 | Preferred for body text |
| Black text on #000C21 | 1.07:1 | Fails | Lc 0.0 | Not readable |
| #000C21 text on white | 19.54:1 | AAA | Lc 105.6 | Preferred for body text |
| #000C21 text on black | 1.07:1 | 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
#F2F6FB
oklch(97.2% 0.008 253.9)
-
Step 100
100
#E2EBF6
oklch(93.7% 0.018 253.3)
-
Step 200
200
#CBDBEF
oklch(88.6% 0.033 254)
-
Step 300
300
#A7C3E7
oklch(80.9% 0.06 254.8)
-
Step 400
400
#77A4DB
oklch(70.8% 0.095 253.9)
-
Step 500
500
#538CD1
oklch(63.2% 0.121 254.2)
-
Step 600
600
#3674BF
oklch(55.5% 0.133 254.8)
-
Step 700
700
#2861A4
oklch(49% 0.123 254.5)
-
Step 800
800
#235085
oklch(42.8% 0.101 254.3)
-
Step 900
900
#21436B
oklch(37.8% 0.08 253.9)
-
Step 950
950 (this color)
#000C21
oklch(15.6% 0.05 254.4)
#000C21 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) | #020E22 | 0.010 |
| Deuteranopia (no green cones) | #000B21 | 0.004 |
| Tritanopia (no blue cones) | #001114 | 0.038 |
| Achromatopsia (no color) | #0C0C0C | 0.050 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #000C21
#000C21
oklch(15.6% 0.05 254.4)
- #150A00
#150A00
oklch(15.7% 0.033 73.5)
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 #000C21, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rich Navy #001219 ΔE 0.032
- Dark Navy Blue #00022E ΔE 0.043
- Midnight #03012D ΔE 0.044
- Almost Black #070D0D ΔE 0.046
- Dark Navy #000435 ΔE 0.047
- Very Dark Blue #000133 ΔE 0.050
- Rich Black #0D1B2A ΔE 0.063
- Navy Blue #001146 ΔE 0.076
Use #000C21 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.