#01091D
Closest named color: Rich Navy (#001219). oklch(14.4% 0.047 258.6), rgb(1, 9, 29).
Aa
White text reads best on this color (19.84:1).
About this color
#01091D is a very dark, muted blue. In OKLCH its lightness is 14%, its chroma 0.047 and its hue 259°. Its hue sits on the cool side of the wheel. The nearest named color is Rich Navy (#001219), ΔE 0.038 away. White text reads best on it, at 19.84:1.
| Hue family | Blues |
| Lightness | very dark (14%) |
| Chroma | muted (0.047) |
| Temperature | cool |
| Nearest name | Rich Navy (#001219) |
| Black text | 1.05:1 |
| White text | 19.84:1 |
Values
| HEX | #01091D |
| RGB | rgb(1, 9, 29) |
| HSL | hsl(223, 93%, 6%) |
| OKLCH | oklch(14.4% 0.047 258.6) |
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 #01091D | 19.84:1 | AAA | Lc -107.7 | Preferred for body text |
| Black text on #01091D | 1.05:1 | Fails | Lc 0.0 | Not readable |
| #01091D text on white | 19.84:1 | AAA | Lc 105.8 | Preferred for body text |
| #01091D 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
#F2F6FB
oklch(97.2% 0.008 253.9)
-
Step 100
100
#E3EAF5
oklch(93.5% 0.017 259.4)
-
Step 200
200
#CDDAEE
oklch(88.5% 0.031 258.9)
-
Step 300
300
#ABC2E5
oklch(80.9% 0.056 258.7)
-
Step 400
400
#7FA2D8
oklch(70.7% 0.089 258.9)
-
Step 500
500
#5E8ACE
oklch(63.1% 0.114 258.8)
-
Step 600
600
#4473BB
oklch(55.7% 0.124 258.7)
-
Step 700
700
#3560A1
oklch(49.1% 0.115 258.5)
-
Step 800
800
#2D4F82
oklch(42.8% 0.094 258.3)
-
Step 900
900
#284269
oklch(37.8% 0.074 258.3)
-
Step 950
950 (this color)
#01091D
oklch(14.4% 0.047 258.6)
#01091D 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) | #010B1E | 0.008 |
| Deuteranopia (no green cones) | #00081D | 0.006 |
| Tritanopia (no blue cones) | #000E11 | 0.036 |
| Achromatopsia (no color) | #0A0A0A | 0.047 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #01091D
#01091D
oklch(14.4% 0.047 258.6)
- #110800
#110800
oklch(14.4% 0.03 76.3)
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 #01091D, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rich Navy #001219 ΔE 0.038
- Midnight #03012D ΔE 0.043
- Dark Navy Blue #00022E ΔE 0.043
- Almost Black #070D0D ΔE 0.044
- Dark Navy #000435 ΔE 0.051
- Very Dark Blue #000133 ΔE 0.052
- Rich Black #0D1B2A ΔE 0.075
- Navy Blue #001146 ΔE 0.086
Use #01091D 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.