#101F2A
Closest named color: Rich Black (#0D1B2A). oklch(23.1% 0.03 241.5), rgb(16, 31, 42).
Aa
White text reads best on this color (16.78:1).
About this color
#101F2A is a very dark close to neutral grey. In OKLCH its lightness is 23%, its chroma 0.030. It has too little chroma to lean warm or cool. The nearest named color is Rich Black (#0D1B2A), ΔE 0.016 away. White text reads best on it, at 16.78:1.
| Hue family | Neutrals |
| Lightness | very dark (23%) |
| Chroma | close to neutral grey (0.030) |
| Temperature | neutral |
| Nearest name | Rich Black (#0D1B2A) |
| Black text | 1.25:1 |
| White text | 16.78:1 |
Values
| HEX | #101F2A |
| RGB | rgb(16, 31, 42) |
| HSL | hsl(205, 45%, 11%) |
| OKLCH | oklch(23.1% 0.03 241.5) |
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 #101F2A | 16.78:1 | AAA | Lc -106.1 | Preferred for body text |
| Black text on #101F2A | 1.25:1 | Fails | Lc 0.0 | Not readable |
| #101F2A text on white | 16.78:1 | AAA | Lc 103.7 | Preferred for body text |
| #101F2A text on black | 1.25:1 | 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
#82A6C1
oklch(70.8% 0.056 241)
-
Step 500
500
#618FB1
oklch(63% 0.072 241.3)
-
Step 600
600
#47799D
oklch(55.6% 0.078 241.4)
-
Step 700
700
#386686
oklch(49.1% 0.072 240.7)
-
Step 800
800
#2F536D
oklch(42.7% 0.06 241.5)
-
Step 900
900
#2A4558
oklch(37.7% 0.046 240.3)
-
Step 950
950 (this color)
#101F2A
oklch(23.1% 0.03 241.5)
#101F2A 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) | #1A1F2B | 0.016 |
| Deuteranopia (no green cones) | #171C2A | 0.014 |
| Tritanopia (no blue cones) | #042223 | 0.024 |
| Achromatopsia (no color) | #1D1D1D | 0.030 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #101F2A
#101F2A
oklch(23.1% 0.03 241.5)
- #271A0E
#271A0E
oklch(23.1% 0.03 63.2)
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 #101F2A, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rich Black #0D1B2A ΔE 0.016
- Dark #1B2431 ΔE 0.028
- Jet #212529 ΔE 0.037
- Oxford Blue #1B263B ΔE 0.042
- Rich Navy #001219 ΔE 0.063
- Space Cadet #2B2D42 ΔE 0.077
- Navy Blue #001146 ΔE 0.078
- Almost Black #070D0D ΔE 0.083
Use #101F2A 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.