#101427
Closest named color: Rich Black (#0D1B2A). oklch(19.8% 0.039 273.4), rgb(16, 20, 39).
Aa
White text reads best on this color (18.23:1).
About this color
#101427 is a very dark, muted blue. In OKLCH its lightness is 20%, its chroma 0.039 and its hue 273°. Its hue sits on the cool side of the wheel. The nearest named color is Rich Black (#0D1B2A), ΔE 0.024 away. White text reads best on it, at 18.23:1.
| Hue family | Blues |
| Lightness | very dark (20%) |
| Chroma | muted (0.039) |
| Temperature | cool |
| Nearest name | Rich Black (#0D1B2A) |
| Black text | 1.15:1 |
| White text | 18.23:1 |
Values
| HEX | #101427 |
| RGB | rgb(16, 20, 39) |
| HSL | hsl(230, 42%, 11%) |
| OKLCH | oklch(19.8% 0.039 273.4) |
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 #101427 | 18.23:1 | AAA | Lc -107.0 | Preferred for body text |
| Black text on #101427 | 1.15:1 | Fails | Lc 0.0 | Not readable |
| #101427 text on white | 18.23:1 | AAA | Lc 104.9 | Preferred for body text |
| #101427 text on black | 1.15:1 | 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
#F4F5FA
oklch(97.1% 0.007 277.2)
-
Step 100
100
#E7E9F3
oklch(93.5% 0.014 277.1)
-
Step 200
200
#D3D8EB
oklch(88.4% 0.027 274.1)
-
Step 300
300
#B7BFDF
oklch(80.9% 0.046 274.3)
-
Step 400
400
#919ECF
oklch(70.7% 0.073 272.9)
-
Step 500
500
#7785C2
oklch(63% 0.094 273.6)
-
Step 600
600
#606EAF
oklch(55.6% 0.102 273.4)
-
Step 700
700
#505C96
oklch(49.1% 0.094 273.6)
-
Step 800
800
#414B7A
oklch(42.6% 0.079 273.5)
-
Step 900
900
#373F62
oklch(37.7% 0.061 273.3)
-
Step 950
950 (this color)
#101427
oklch(19.8% 0.039 273.4)
#101427 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) | #0D1628 | 0.008 |
| Deuteranopia (no green cones) | #0B1427 | 0.008 |
| Tritanopia (no blue cones) | #08181B | 0.035 |
| Achromatopsia (no color) | #151515 | 0.039 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #101427
#101427
oklch(19.8% 0.039 273.4)
- #1C1501
#1C1501
oklch(19.9% 0.039 92.1)
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 #101427, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rich Black #0D1B2A ΔE 0.024
- Rich Navy #001219 ΔE 0.042
- Almost Black #070D0D ΔE 0.059
- Dark #1B2431 ΔE 0.061
- Navy Blue #001146 ΔE 0.066
- Dark Navy #000435 ΔE 0.069
- Jet #212529 ΔE 0.071
- Oxford Blue #1B263B ΔE 0.072
Use #101427 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.