#101327
Closest named color: Rich Black (#0D1B2A). oklch(19.5% 0.04 275.6), rgb(16, 19, 39).
Aa
White text reads best on this color (18.34:1).
About this color
#101327 is a very dark, muted blue. In OKLCH its lightness is 20%, its chroma 0.040 and its hue 276°. Its hue sits on the cool side of the wheel. The nearest named color is Rich Black (#0D1B2A), ΔE 0.028 away. White text reads best on it, at 18.34:1.
| Hue family | Blues |
| Lightness | very dark (20%) |
| Chroma | muted (0.040) |
| Temperature | cool |
| Nearest name | Rich Black (#0D1B2A) |
| Black text | 1.14:1 |
| White text | 18.34:1 |
Values
| HEX | #101327 |
| RGB | rgb(16, 19, 39) |
| HSL | hsl(232, 42%, 11%) |
| OKLCH | oklch(19.5% 0.04 275.6) |
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 #101327 | 18.34:1 | AAA | Lc -107.1 | Preferred for body text |
| Black text on #101327 | 1.14:1 | Fails | Lc 0.0 | Not readable |
| #101327 text on white | 18.34:1 | AAA | Lc 105.0 | Preferred for body text |
| #101327 text on black | 1.14:1 | 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
#D4D8EB
oklch(88.5% 0.026 276.4)
-
Step 300
300
#B7BFE0
oklch(80.9% 0.047 274.6)
-
Step 400
400
#939DD1
oklch(70.7% 0.077 275.8)
-
Step 500
500
#7984C5
oklch(63.1% 0.099 275.9)
-
Step 600
600
#626DB1
oklch(55.6% 0.106 275.4)
-
Step 700
700
#515B98
oklch(49.1% 0.098 275.1)
-
Step 800
800
#434A7B
oklch(42.6% 0.082 276.2)
-
Step 900
900
#383E63
oklch(37.6% 0.064 275.9)
-
Step 950
950 (this color)
#101327
oklch(19.5% 0.04 275.6)
#101327 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) | #0B1528 | 0.010 |
| Deuteranopia (no green cones) | #091427 | 0.011 |
| Tritanopia (no blue cones) | #08171B | 0.035 |
| Achromatopsia (no color) | #141414 | 0.041 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #101327
#101327
oklch(19.5% 0.04 275.6)
- #1B1500
#1B1500
oklch(19.7% 0.041 95.6)
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 #101327, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rich Black #0D1B2A ΔE 0.028
- Rich Navy #001219 ΔE 0.042
- Almost Black #070D0D ΔE 0.059
- Dark #1B2431 ΔE 0.065
- Navy Blue #001146 ΔE 0.065
- Dark Navy #000435 ΔE 0.067
- Midnight #03012D ΔE 0.072
- Dark Navy Blue #00022E ΔE 0.073
Use #101327 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.