#101C28
Closest named color: Rich Black (#0D1B2A). oklch(22.1% 0.029 249.3), rgb(16, 28, 40).
Aa
White text reads best on this color (17.23:1).
About this color
#101C28 is a very dark close to neutral grey. In OKLCH its lightness is 22%, its chroma 0.029. It has too little chroma to lean warm or cool. The nearest named color is Rich Black (#0D1B2A), ΔE 0.007 away. White text reads best on it, at 17.23:1.
| Hue family | Neutrals |
| Lightness | very dark (22%) |
| Chroma | close to neutral grey (0.029) |
| Temperature | neutral |
| Nearest name | Rich Black (#0D1B2A) |
| Black text | 1.21:1 |
| White text | 17.23:1 |
Values
| HEX | #101C28 |
| RGB | rgb(16, 28, 40) |
| HSL | hsl(210, 43%, 11%) |
| OKLCH | oklch(22.1% 0.029 249.3) |
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 #101C28 | 17.23:1 | AAA | Lc -106.4 | Preferred for body text |
| Black text on #101C28 | 1.21:1 | Fails | Lc 0.0 | Not readable |
| #101C28 text on white | 17.23:1 | AAA | Lc 104.1 | Preferred for body text |
| #101C28 text on black | 1.21:1 | 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
#E5EBF0
oklch(93.7% 0.009 242.8)
-
Step 200
200
#D0DAE6
oklch(88.4% 0.02 252.9)
-
Step 300
300
#B0C3D7
oklch(80.9% 0.035 249.6)
-
Step 400
400
#86A4C2
oklch(70.7% 0.055 248.6)
-
Step 500
500
#688DB3
oklch(63.1% 0.071 249.7)
-
Step 600
600
#4F779F
oklch(55.6% 0.077 249.4)
-
Step 700
700
#406488
oklch(49.2% 0.071 249.5)
-
Step 800
800
#35526E
oklch(42.8% 0.058 248.5)
-
Step 900
900
#2E4459
oklch(37.8% 0.046 248)
-
Step 950
950 (this color)
#101C28
oklch(22.1% 0.029 249.3)
#101C28 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) | #171C29 | 0.011 |
| Deuteranopia (no green cones) | #141A28 | 0.009 |
| Tritanopia (no blue cones) | #061F20 | 0.026 |
| Achromatopsia (no color) | #1B1B1B | 0.029 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #101C28
#101C28
oklch(22.1% 0.029 249.3)
- #24180B
#24180B
oklch(22.1% 0.03 67.5)
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 #101C28, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rich Black #0D1B2A ΔE 0.007
- Dark #1B2431 ΔE 0.037
- Jet #212529 ΔE 0.045
- Oxford Blue #1B263B ΔE 0.050
- Rich Navy #001219 ΔE 0.054
- Almost Black #070D0D ΔE 0.073
- Navy Blue #001146 ΔE 0.075
- Space Cadet #2B2D42 ΔE 0.086
Use #101C28 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.