#010D21
Closest named color: Rich Navy (#001219). oklch(16% 0.048 255), rgb(1, 13, 33).
Aa
White text reads best on this color (19.42:1).
About this color
#010D21 is a very dark, muted blue. In OKLCH its lightness is 16%, its chroma 0.048 and its hue 255°. Its hue sits on the cool side of the wheel. The nearest named color is Rich Navy (#001219), ΔE 0.028 away. White text reads best on it, at 19.42:1.
| Hue family | Blues |
| Lightness | very dark (16%) |
| Chroma | muted (0.048) |
| Temperature | cool |
| Nearest name | Rich Navy (#001219) |
| Black text | 1.08:1 |
| White text | 19.42:1 |
Values
| HEX | #010D21 |
| RGB | rgb(1, 13, 33) |
| HSL | hsl(218, 94%, 7%) |
| OKLCH | oklch(16% 0.048 255) |
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 #010D21 | 19.42:1 | AAA | Lc -107.5 | Preferred for body text |
| Black text on #010D21 | 1.08:1 | Fails | Lc 0.0 | Not readable |
| #010D21 text on white | 19.42:1 | AAA | Lc 105.5 | Preferred for body text |
| #010D21 text on black | 1.08:1 | 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
#E3EBF5
oklch(93.7% 0.016 253.9)
-
Step 200
200
#CCDBEE
oklch(88.6% 0.031 254.3)
-
Step 300
300
#A9C3E5
oklch(80.9% 0.056 255.2)
-
Step 400
400
#7AA3D8
oklch(70.6% 0.09 255.1)
-
Step 500
500
#578CCE
oklch(63.2% 0.115 254.7)
-
Step 600
600
#3C74BB
oklch(55.5% 0.126 255.4)
-
Step 700
700
#2E61A1
oklch(49% 0.117 255.4)
-
Step 800
800
#275083
oklch(42.8% 0.097 255.1)
-
Step 900
900
#244269
oklch(37.6% 0.076 255.7)
-
Step 950
950 (this color)
#010D21
oklch(16% 0.048 255)
#010D21 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) | #040F22 | 0.011 |
| Deuteranopia (no green cones) | #000C21 | 0.005 |
| Tritanopia (no blue cones) | #001215 | 0.036 |
| Achromatopsia (no color) | #0D0D0D | 0.048 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #010D21
#010D21
oklch(16% 0.048 255)
- #160B00
#160B00
oklch(16.1% 0.034 74.8)
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 #010D21, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rich Navy #001219 ΔE 0.028
- Almost Black #070D0D ΔE 0.044
- Dark Navy Blue #00022E ΔE 0.047
- Midnight #03012D ΔE 0.048
- Dark Navy #000435 ΔE 0.049
- Very Dark Blue #000133 ΔE 0.053
- Rich Black #0D1B2A ΔE 0.059
- Navy Blue #001146 ΔE 0.075
Use #010D21 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.