#101228
Closest named color: Rich Black (#0D1B2A). oklch(19.4% 0.044 277.5), rgb(16, 18, 40).
Aa
White text reads best on this color (18.43:1).
About this color
#101228 is a very dark, muted blue. In OKLCH its lightness is 19%, its chroma 0.044 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 18.43:1.
| Hue family | Blues |
| Lightness | very dark (19%) |
| Chroma | muted (0.044) |
| Temperature | cool |
| Nearest name | Rich Black (#0D1B2A) |
| Black text | 1.13:1 |
| White text | 18.43:1 |
Values
| HEX | #101228 |
| RGB | rgb(16, 18, 40) |
| HSL | hsl(235, 43%, 11%) |
| OKLCH | oklch(19.4% 0.044 277.5) |
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 #101228 | 18.43:1 | AAA | Lc -107.1 | Preferred for body text |
| Black text on #101228 | 1.13:1 | Fails | Lc 0.0 | Not readable |
| #101228 text on white | 18.43:1 | AAA | Lc 105.0 | Preferred for body text |
| #101228 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
#D4D8ED
oklch(88.6% 0.029 277.2)
-
Step 300
300
#B8BEE3
oklch(80.9% 0.053 277.9)
-
Step 400
400
#949CD5
oklch(70.8% 0.084 277.9)
-
Step 500
500
#7A83C9
oklch(63.2% 0.106 277.3)
-
Step 600
600
#636BB6
oklch(55.5% 0.116 277.3)
-
Step 700
700
#53599D
oklch(49.1% 0.108 277.8)
-
Step 800
800
#44497F
oklch(42.7% 0.089 277.9)
-
Step 900
900
#393D66
oklch(37.6% 0.07 278.2)
-
Step 950
950 (this color)
#101228
oklch(19.4% 0.044 277.5)
#101228 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) | #091529 | 0.014 |
| Deuteranopia (no green cones) | #071328 | 0.014 |
| Tritanopia (no blue cones) | #07171B | 0.039 |
| Achromatopsia (no color) | #141414 | 0.044 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #101228
#101228
oklch(19.4% 0.044 277.5)
- #1A1400
#1A1400
oklch(19.3% 0.04 95.2)
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 #101228, 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 0.044
- Almost Black #070D0D ΔE 0.060
- Navy Blue #001146 ΔE 0.063
- Dark Navy #000435 ΔE 0.063
- Dark #1B2431 ΔE 0.068
- Midnight #03012D ΔE 0.068
- Dark Navy Blue #00022E ΔE 0.070
Use #101228 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.