#011923
Closest named color: Rich Black (#0D1B2A). oklch(20% 0.037 227.6), rgb(1, 25, 35).
Aa
White text reads best on this color (18.03:1).
About this color
#011923 is a very dark, muted teal or cyan. In OKLCH its lightness is 20%, its chroma 0.037 and its hue 228°. Its hue sits on the cool side of the wheel. The nearest named color is Rich Black (#0D1B2A), ΔE 0.024 away. White text reads best on it, at 18.03:1.
| Hue family | Teals and cyans |
| Lightness | very dark (20%) |
| Chroma | muted (0.037) |
| Temperature | cool |
| Nearest name | Rich Black (#0D1B2A) |
| Black text | 1.16:1 |
| White text | 18.03:1 |
Values
| HEX | #011923 |
| RGB | rgb(1, 25, 35) |
| HSL | hsl(198, 94%, 7%) |
| OKLCH | oklch(20% 0.037 227.6) |
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 #011923 | 18.03:1 | AAA | Lc -106.8 | Preferred for body text |
| Black text on #011923 | 1.16:1 | Fails | Lc 0.0 | Not readable |
| #011923 text on white | 18.03:1 | AAA | Lc 104.6 | Preferred for body text |
| #011923 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
#F2F6F9
oklch(97.1% 0.006 239.8)
-
Step 100
100
#E2ECF1
oklch(93.7% 0.013 228.9)
-
Step 200
200
#C9DDE6
oklch(88.5% 0.025 226.5)
-
Step 300
300
#A4C7D7
oklch(80.9% 0.044 227.3)
-
Step 400
400
#70AAC3
oklch(70.7% 0.071 227)
-
Step 500
500
#4694B4
oklch(63.1% 0.09 227.7)
-
Step 600
600
#217EA0
oklch(55.6% 0.098 227.8)
-
Step 700
700
#106A89
oklch(49.1% 0.091 228)
-
Step 800
800
#13576F
oklch(42.8% 0.075 227)
-
Step 900
900
#19485A
oklch(37.8% 0.059 226.9)
-
Step 950
950 (this color)
#011923
oklch(20% 0.037 227.6)
#011923 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) | #141823 | 0.027 |
| Deuteranopia (no green cones) | #0F1523 | 0.023 |
| Tritanopia (no blue cones) | #001C1C | 0.021 |
| Achromatopsia (no color) | #161616 | 0.037 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #011923
#011923
oklch(20% 0.037 227.6)
- #231007
#231007
oklch(19.8% 0.036 46.1)
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 #011923, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rich Black #0D1B2A ΔE 0.024
- Rich Navy #001219 ΔE 0.031
- Almost Black #070D0D ΔE 0.055
- Dark #1B2431 ΔE 0.061
- Jet #212529 ΔE 0.069
- Oxford Blue #1B263B ΔE 0.074
- Navy Blue #001146 ΔE 0.076
- Dark Navy #000435 ΔE 0.080
Use #011923 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.