#091523
Closest named color: Rich Black (#0D1B2A). oklch(19.3% 0.033 253.2), rgb(9, 21, 35).
Aa
White text reads best on this color (18.37:1).
About this color
#091523 is a very dark, muted blue. In OKLCH its lightness is 19%, its chroma 0.033 and its hue 253°. Its hue sits on the cool side of the wheel. The nearest named color is Rich Black (#0D1B2A), ΔE 0.025 away. White text reads best on it, at 18.37:1.
| Hue family | Blues |
| Lightness | very dark (19%) |
| Chroma | muted (0.033) |
| Temperature | cool |
| Nearest name | Rich Black (#0D1B2A) |
| Black text | 1.14:1 |
| White text | 18.37:1 |
Values
| HEX | #091523 |
| RGB | rgb(9, 21, 35) |
| HSL | hsl(212, 59%, 9%) |
| OKLCH | oklch(19.3% 0.033 253.2) |
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 #091523 | 18.37:1 | AAA | Lc -107.1 | Preferred for body text |
| Black text on #091523 | 1.14:1 | Fails | Lc 0.0 | Not readable |
| #091523 text on white | 18.37:1 | AAA | Lc 105.0 | Preferred for body text |
| #091523 text on black | 1.14:1 | 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
#F3F6F9
oklch(97.2% 0.005 247.9)
-
Step 100
100
#E5EAF2
oklch(93.6% 0.012 259.8)
-
Step 200
200
#CFDAE8
oklch(88.4% 0.023 254.4)
-
Step 300
300
#AFC3DA
oklch(80.9% 0.039 252)
-
Step 400
400
#85A3C8
oklch(70.6% 0.064 253.9)
-
Step 500
500
#668CBA
oklch(63% 0.082 253.7)
-
Step 600
600
#4D76A6
oklch(55.7% 0.088 253.2)
-
Step 700
700
#3E638E
oklch(49.1% 0.081 253.1)
-
Step 800
800
#335173
oklch(42.7% 0.067 252.5)
-
Step 900
900
#2D435D
oklch(37.7% 0.053 253.2)
-
Step 950
950 (this color)
#091523
oklch(19.3% 0.033 253.2)
#091523 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) | #0F1624 | 0.010 |
| Deuteranopia (no green cones) | #0C1323 | 0.008 |
| Tritanopia (no blue cones) | #00181A | 0.029 |
| Achromatopsia (no color) | #141414 | 0.033 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #091523
#091523
oklch(19.3% 0.033 253.2)
- #1D1203
#1D1203
oklch(19.3% 0.034 75.6)
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 #091523, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rich Black #0D1B2A ΔE 0.025
- Rich Navy #001219 ΔE 0.029
- Almost Black #070D0D ΔE 0.050
- Dark #1B2431 ΔE 0.066
- Dark Navy #000435 ΔE 0.071
- Navy Blue #001146 ΔE 0.072
- Jet #212529 ΔE 0.074
- Dark Navy Blue #00022E ΔE 0.076
Use #091523 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.