#101D23
Closest named color: Rich Black (#0D1B2A). oklch(22.2% 0.022 228.6), rgb(16, 29, 35).
Aa
White text reads best on this color (17.18:1).
About this color
#101D23 is a very dark close to neutral grey. In OKLCH its lightness is 22%, its chroma 0.022. It has too little chroma to lean warm or cool. The nearest named color is Rich Black (#0D1B2A), ΔE 0.018 away. White text reads best on it, at 17.18:1.
| Hue family | Neutrals |
| Lightness | very dark (22%) |
| Chroma | close to neutral grey (0.022) |
| Temperature | neutral |
| Nearest name | Rich Black (#0D1B2A) |
| Black text | 1.22:1 |
| White text | 17.18:1 |
Values
| HEX | #101D23 |
| RGB | rgb(16, 29, 35) |
| HSL | hsl(199, 37%, 10%) |
| OKLCH | oklch(22.2% 0.022 228.6) |
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 #101D23 | 17.18:1 | AAA | Lc -106.4 | Preferred for body text |
| Black text on #101D23 | 1.22:1 | Fails | Lc 0.0 | Not readable |
| #101D23 text on white | 17.18:1 | AAA | Lc 104.0 | Preferred for body text |
| #101D23 text on black | 1.22:1 | 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
#F3F6F7
oklch(97.1% 0.003 219.5)
-
Step 100
100
#E5EBEE
oklch(93.6% 0.008 228.9)
-
Step 200
200
#D0DBE1
oklch(88.5% 0.015 231.2)
-
Step 300
300
#B0C4CE
oklch(80.8% 0.026 229.2)
-
Step 400
400
#87A6B5
oklch(70.7% 0.041 228.8)
-
Step 500
500
#6890A3
oklch(63.1% 0.052 229)
-
Step 600
600
#4F7A8E
oklch(55.6% 0.057 229)
-
Step 700
700
#3F6779
oklch(49.2% 0.053 228.4)
-
Step 800
800
#355462
oklch(42.8% 0.043 228.2)
-
Step 900
900
#2E4550
oklch(37.6% 0.034 229.3)
-
Step 950
950 (this color)
#101D23
oklch(22.2% 0.022 228.6)
#101D23 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) | #1A1C23 | 0.016 |
| Deuteranopia (no green cones) | #171A23 | 0.015 |
| Tritanopia (no blue cones) | #081F1F | 0.016 |
| Achromatopsia (no color) | #1B1B1B | 0.022 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #101D23
#101D23
oklch(22.2% 0.022 228.6)
- #231812
#231812
oklch(22.1% 0.021 49.9)
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 #101D23, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rich Black #0D1B2A ΔE 0.018
- Dark #1B2431 ΔE 0.039
- Jet #212529 ΔE 0.043
- Rich Navy #001219 ΔE 0.054
- Oxford Blue #1B263B ΔE 0.055
- Almost Black #070D0D ΔE 0.071
- Dark Brown #341C02 ΔE 0.082
- Navy Blue #001146 ΔE 0.086
Use #101D23 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.