#102123
Closest named color: Rich Black (#0D1B2A). oklch(23.4% 0.023 205.3), rgb(16, 33, 35).
Aa
White text reads best on this color (16.61:1).
About this color
#102123 is a very dark close to neutral grey. In OKLCH its lightness is 23%, its chroma 0.023. It has too little chroma to lean warm or cool. The nearest named color is Rich Black (#0D1B2A), ΔE 0.030 away. White text reads best on it, at 16.61:1.
| Hue family | Neutrals |
| Lightness | very dark (23%) |
| Chroma | close to neutral grey (0.023) |
| Temperature | neutral |
| Nearest name | Rich Black (#0D1B2A) |
| Black text | 1.26:1 |
| White text | 16.61:1 |
Values
| HEX | #102123 |
| RGB | rgb(16, 33, 35) |
| HSL | hsl(186, 37%, 10%) |
| OKLCH | oklch(23.4% 0.023 205.3) |
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 #102123 | 16.61:1 | AAA | Lc -106.0 | Preferred for body text |
| Black text on #102123 | 1.26:1 | Fails | Lc 0.0 | Not readable |
| #102123 text on white | 16.61:1 | AAA | Lc 103.5 | Preferred for body text |
| #102123 text on black | 1.26:1 | 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
#F3F6F6
oklch(97.1% 0.003 197.1)
-
Step 100
100
#E4EBEC
oklch(93.5% 0.008 207.1)
-
Step 200
200
#CEDCDE
oklch(88.4% 0.015 207.1)
-
Step 300
300
#ADC6C9
oklch(80.9% 0.027 205.4)
-
Step 400
400
#81A9AE
oklch(70.7% 0.044 205.7)
-
Step 500
500
#60949A
oklch(63.2% 0.056 205.1)
-
Step 600
600
#457E84
oklch(55.7% 0.061 204.4)
-
Step 700
700
#366A70
oklch(49.1% 0.056 205.3)
-
Step 800
800
#2D565B
oklch(42.5% 0.047 205.8)
-
Step 900
900
#29474B
oklch(37.6% 0.036 206.5)
-
Step 950
950 (this color)
#102123
oklch(23.4% 0.023 205.3)
#102123 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) | #1F2023 | 0.024 |
| Deuteranopia (no green cones) | #1B1D23 | 0.021 |
| Tritanopia (no blue cones) | #082222 | 0.010 |
| Achromatopsia (no color) | #1E1E1E | 0.023 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #102123
#102123
oklch(23.4% 0.023 205.3)
- #281A18
#281A18
oklch(23.5% 0.023 28.1)
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 #102123, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rich Black #0D1B2A ΔE 0.030
- Dark #1B2431 ΔE 0.033
- Jet #212529 ΔE 0.033
- Oxford Blue #1B263B ΔE 0.050
- Rich Navy #001219 ΔE 0.066
- Dark Brown #341C02 ΔE 0.076
- Dark Forest Green #002D04 ΔE 0.079
- Very Dark Green #062E03 ΔE 0.081
Use #102123 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.