#091823
Closest named color: Rich Black (#0D1B2A). oklch(20.2% 0.03 242.1), rgb(9, 24, 35).
Aa
White text reads best on this color (18.00:1).
About this color
#091823 is a very dark, muted blue. In OKLCH its lightness is 20%, its chroma 0.030 and its hue 242°. Its hue sits on the cool side of the wheel. The nearest named color is Rich Black (#0D1B2A), ΔE 0.018 away. White text reads best on it, at 18.00:1.
| Hue family | Blues |
| Lightness | very dark (20%) |
| Chroma | muted (0.030) |
| Temperature | cool |
| Nearest name | Rich Black (#0D1B2A) |
| Black text | 1.16:1 |
| White text | 18.00:1 |
Values
| HEX | #091823 |
| RGB | rgb(9, 24, 35) |
| HSL | hsl(205, 59%, 9%) |
| OKLCH | oklch(20.2% 0.03 242.1) |
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 #091823 | 18.00:1 | AAA | Lc -106.9 | Preferred for body text |
| Black text on #091823 | 1.16:1 | Fails | Lc 0.0 | Not readable |
| #091823 text on white | 18.00:1 | AAA | Lc 104.7 | Preferred for body text |
| #091823 text on black | 1.16:1 | 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
#F3F6F8
oklch(97.1% 0.004 236.5)
-
Step 100
100
#E4EBF0
oklch(93.6% 0.01 238.5)
-
Step 200
200
#CEDBE5
oklch(88.5% 0.02 240.8)
-
Step 300
300
#ADC4D6
oklch(80.9% 0.036 241.6)
-
Step 400
400
#81A6C2
oklch(70.8% 0.058 241.3)
-
Step 500
500
#618FB2
oklch(63.1% 0.073 242.1)
-
Step 600
600
#46799E
oklch(55.6% 0.08 241.7)
-
Step 700
700
#386687
oklch(49.2% 0.073 241.6)
-
Step 800
800
#2F536E
oklch(42.7% 0.061 242.5)
-
Step 900
900
#2A4559
oklch(37.8% 0.048 241.7)
-
Step 950
950 (this color)
#091823
oklch(20.2% 0.03 242.1)
#091823 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) | #131824 | 0.015 |
| Deuteranopia (no green cones) | #101523 | 0.014 |
| Tritanopia (no blue cones) | #001B1C | 0.024 |
| Achromatopsia (no color) | #171717 | 0.030 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #091823
#091823
oklch(20.2% 0.03 242.1)
- #201307
#201307
oklch(20.1% 0.031 63.1)
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 #091823, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rich Black #0D1B2A ΔE 0.018
- Rich Navy #001219 ΔE 0.034
- Almost Black #070D0D ΔE 0.055
- Dark #1B2431 ΔE 0.057
- Jet #212529 ΔE 0.064
- Oxford Blue #1B263B ΔE 0.070
- Navy Blue #001146 ΔE 0.075
- Dark Navy #000435 ΔE 0.080
Use #091823 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.