#01091B
Closest named color: Rich Navy (#001219). oklch(14.2% 0.043 257), rgb(1, 9, 27).
Aa
White text reads best on this color (19.88:1).
About this color
#01091B is a very dark, muted blue. In OKLCH its lightness is 14%, its chroma 0.043 and its hue 257°. Its hue sits on the cool side of the wheel. The nearest named color is Rich Navy (#001219), ΔE 0.037 away. White text reads best on it, at 19.88:1.
| Hue family | Blues |
| Lightness | very dark (14%) |
| Chroma | muted (0.043) |
| Temperature | cool |
| Nearest name | Rich Navy (#001219) |
| Black text | 1.05:1 |
| White text | 19.88:1 |
Values
| HEX | #01091B |
| RGB | rgb(1, 9, 27) |
| HSL | hsl(222, 93%, 5%) |
| OKLCH | oklch(14.2% 0.043 257) |
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 #01091B | 19.88:1 | AAA | Lc -107.7 | Preferred for body text |
| Black text on #01091B | 1.05:1 | Fails | Lc 0.0 | Not readable |
| #01091B text on white | 19.88:1 | AAA | Lc 105.8 | Preferred for body text |
| #01091B text on black | 1.05:1 | 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
#F3F6FA
oklch(97.2% 0.006 255.5)
-
Step 100
100
#E4EAF4
oklch(93.5% 0.015 260.7)
-
Step 200
200
#CDDAEC
oklch(88.4% 0.029 256.5)
-
Step 300
300
#ACC2E2
oklch(80.8% 0.051 257.7)
-
Step 400
400
#80A3D4
oklch(70.8% 0.082 256.9)
-
Step 500
500
#5F8BC8
oklch(63.1% 0.105 256.7)
-
Step 600
600
#4574B5
oklch(55.6% 0.114 256.8)
-
Step 700
700
#37619C
oklch(49.1% 0.106 257.2)
-
Step 800
800
#2E4F7E
oklch(42.6% 0.088 257.4)
-
Step 900
900
#294265
oklch(37.6% 0.068 257)
-
Step 950
950 (this color)
#01091B
oklch(14.2% 0.043 257)
#01091B 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) | #020B1C | 0.009 |
| Deuteranopia (no green cones) | #00081B | 0.006 |
| Tritanopia (no blue cones) | #000D10 | 0.032 |
| Achromatopsia (no color) | #090909 | 0.043 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #01091B
#01091B
oklch(14.2% 0.043 257)
- #100800
#100800
oklch(14.3% 0.03 79.6)
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 #01091B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rich Navy #001219 ΔE 0.037
- Almost Black #070D0D ΔE 0.041
- Midnight #03012D ΔE 0.047
- Dark Navy Blue #00022E ΔE 0.047
- Dark Navy #000435 ΔE 0.056
- Very Dark Blue #000133 ΔE 0.056
- Rich Black #0D1B2A ΔE 0.076
- Navy Blue #001146 ΔE 0.090
Use #01091B 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.