#101227
Closest named color: Rich Black (#0D1B2A). oklch(19.3% 0.042 277.5), rgb(16, 18, 39).
Aa
White text reads best on this color (18.45:1).
About this color
#101227 is a very dark, muted blue. In OKLCH its lightness is 19%, its chroma 0.042 and its hue 278°. Its hue sits on the cool side of the wheel. The nearest named color is Rich Black (#0D1B2A), ΔE 0.031 away. White text reads best on it, at 18.45:1.
| Hue family | Blues |
| Lightness | very dark (19%) |
| Chroma | muted (0.042) |
| Temperature | cool |
| Nearest name | Rich Black (#0D1B2A) |
| Black text | 1.13:1 |
| White text | 18.45:1 |
Values
| HEX | #101227 |
| RGB | rgb(16, 18, 39) |
| HSL | hsl(235, 42%, 11%) |
| OKLCH | oklch(19.3% 0.042 277.5) |
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 #101227 | 18.45:1 | AAA | Lc -107.1 | Preferred for body text |
| Black text on #101227 | 1.13:1 | Fails | Lc 0.0 | Not readable |
| #101227 text on white | 18.45:1 | AAA | Lc 105.0 | Preferred for body text |
| #101227 text on black | 1.13:1 | 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
#E7E9F4
oklch(93.6% 0.015 277.8)
-
Step 200
200
#D4D8EC
oklch(88.5% 0.028 276.8)
-
Step 300
300
#B8BEE1
oklch(80.8% 0.05 277.6)
-
Step 400
400
#949CD3
oklch(70.7% 0.081 277.7)
-
Step 500
500
#7A83C7
oklch(63.1% 0.103 277.3)
-
Step 600
600
#646CB3
oklch(55.6% 0.11 277.3)
-
Step 700
700
#535A9A
oklch(49.2% 0.102 277.2)
-
Step 800
800
#44497D
oklch(42.6% 0.086 277.9)
-
Step 900
900
#393E65
oklch(37.8% 0.067 277.1)
-
Step 950
950 (this color)
#101227
oklch(19.3% 0.042 277.5)
#101227 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) | #0A1528 | 0.013 |
| Deuteranopia (no green cones) | #081327 | 0.013 |
| Tritanopia (no blue cones) | #08161A | 0.037 |
| Achromatopsia (no color) | #141414 | 0.042 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #101227
#101227
oklch(19.3% 0.042 277.5)
- #191400
#191400
oklch(19.2% 0.04 97.7)
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 #101227, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rich Black #0D1B2A ΔE 0.031
- Rich Navy #001219 ΔE 0.043
- Almost Black #070D0D ΔE 0.058
- Dark Navy #000435 ΔE 0.064
- Navy Blue #001146 ΔE 0.065
- Dark #1B2431 ΔE 0.068
- Midnight #03012D ΔE 0.069
- Dark Navy Blue #00022E ΔE 0.070
Use #101227 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.