#101F25
Closest named color: Rich Black (#0D1B2A). oklch(22.9% 0.024 225.3), rgb(16, 31, 37).
Aa
White text reads best on this color (16.87:1).
About this color
#101F25 is a very dark close to neutral grey. In OKLCH its lightness is 23%, its chroma 0.024. It has too little chroma to lean warm or cool. The nearest named color is Rich Black (#0D1B2A), ΔE 0.021 away. White text reads best on it, at 16.87:1.
| Hue family | Neutrals |
| Lightness | very dark (23%) |
| Chroma | close to neutral grey (0.024) |
| Temperature | neutral |
| Nearest name | Rich Black (#0D1B2A) |
| Black text | 1.24:1 |
| White text | 16.87:1 |
Values
| HEX | #101F25 |
| RGB | rgb(16, 31, 37) |
| HSL | hsl(197, 40%, 10%) |
| OKLCH | oklch(22.9% 0.024 225.3) |
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 #101F25 | 16.87:1 | AAA | Lc -106.1 | Preferred for body text |
| Black text on #101F25 | 1.24:1 | Fails | Lc 0.0 | Not readable |
| #101F25 text on white | 16.87:1 | AAA | Lc 103.8 | Preferred for body text |
| #101F25 text on black | 1.24:1 | 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
#E4EBEE
oklch(93.6% 0.009 225.1)
-
Step 200
200
#CFDBE1
oklch(88.4% 0.015 229)
-
Step 300
300
#AEC5CE
oklch(80.9% 0.028 223.3)
-
Step 400
400
#83A7B6
oklch(70.7% 0.045 225.3)
-
Step 500
500
#6391A4
oklch(63.1% 0.057 225.7)
-
Step 600
600
#497B8F
oklch(55.6% 0.062 225.7)
-
Step 700
700
#3A687A
oklch(49.2% 0.058 225.4)
-
Step 800
800
#315563
oklch(42.8% 0.047 224.9)
-
Step 900
900
#2B4651
oklch(37.7% 0.038 225.7)
-
Step 950
950 (this color)
#101F25
oklch(22.9% 0.024 225.3)
#101F25 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) | #1C1E25 | 0.019 |
| Deuteranopia (no green cones) | #191C25 | 0.017 |
| Tritanopia (no blue cones) | #072121 | 0.016 |
| Achromatopsia (no color) | #1D1D1D | 0.024 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #101F25
#101F25
oklch(22.9% 0.024 225.3)
- #261913
#261913
oklch(22.8% 0.024 45.8)
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 #101F25, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rich Black #0D1B2A ΔE 0.021
- Dark #1B2431 ΔE 0.033
- Jet #212529 ΔE 0.037
- Oxford Blue #1B263B ΔE 0.049
- Rich Navy #001219 ΔE 0.060
- Almost Black #070D0D ΔE 0.078
- Dark Brown #341C02 ΔE 0.081
- Space Cadet #2B2D42 ΔE 0.082
Use #101F25 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.