#101833
Closest named color: Rich Black (#0D1B2A). oklch(21.8% 0.054 269.1), rgb(16, 24, 51).
Aa
White text reads best on this color (17.49:1).
About this color
#101833 is a very dark, muted blue. In OKLCH its lightness is 22%, its chroma 0.054 and its hue 269°. Its hue sits on the cool side of the wheel. The nearest named color is Rich Black (#0D1B2A), ΔE 0.023 away. White text reads best on it, at 17.49:1.
| Hue family | Blues |
| Lightness | very dark (22%) |
| Chroma | muted (0.054) |
| Temperature | cool |
| Nearest name | Rich Black (#0D1B2A) |
| Black text | 1.20:1 |
| White text | 17.49:1 |
Values
| HEX | #101833 |
| RGB | rgb(16, 24, 51) |
| HSL | hsl(226, 52%, 13%) |
| OKLCH | oklch(21.8% 0.054 269.1) |
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 #101833 | 17.49:1 | AAA | Lc -106.5 | Preferred for body text |
| Black text on #101833 | 1.20:1 | Fails | Lc 0.0 | Not readable |
| #101833 text on white | 17.49:1 | AAA | Lc 104.2 | Preferred for body text |
| #101833 text on black | 1.20:1 | 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
#F3F5FB
oklch(97% 0.008 271.3)
-
Step 100
100
#E5EAF7
oklch(93.7% 0.018 269.1)
-
Step 200
200
#CFD9F2
oklch(88.5% 0.036 268.3)
-
Step 300
300
#B0C0EB
oklch(81% 0.063 269)
-
Step 400
400
#869EE1
oklch(70.7% 0.102 268.6)
-
Step 500
500
#6984D9
oklch(63.1% 0.132 269.1)
-
Step 600
600
#526CC6
oklch(55.6% 0.142 269.2)
-
Step 700
700
#435AAB
oklch(49.2% 0.132 269.2)
-
Step 800
800
#374A8B
oklch(42.8% 0.11 269.1)
-
Step 900
900
#2F3E6F
oklch(37.7% 0.086 269.2)
-
Step 950
950 (this color)
#101833
oklch(21.8% 0.054 269.1)
#101833 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) | #0C1B34 | 0.011 |
| Deuteranopia (no green cones) | #071832 | 0.012 |
| Tritanopia (no blue cones) | #001E23 | 0.047 |
| Achromatopsia (no color) | #1A1A1A | 0.054 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #101833
#101833
oklch(21.8% 0.054 269.1)
- #221900
#221900
oklch(21.8% 0.045 90.7)
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 #101833, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rich Black #0D1B2A ΔE 0.023
- Dark #1B2431 ΔE 0.048
- Navy Blue #001146 ΔE 0.049
- Oxford Blue #1B263B ΔE 0.053
- Rich Navy #001219 ΔE 0.063
- Jet #212529 ΔE 0.063
- Night Blue #040348 ΔE 0.071
- Dark Navy #000435 ΔE 0.072
Use #101833 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.