#101830
Closest named color: Rich Black (#0D1B2A). oklch(21.6% 0.049 268.2), rgb(16, 24, 48).
Aa
White text reads best on this color (17.56:1).
About this color
#101830 is a very dark, muted blue. In OKLCH its lightness is 22%, its chroma 0.049 and its hue 268°. Its hue sits on the cool side of the wheel. The nearest named color is Rich Black (#0D1B2A), ΔE 0.018 away. White text reads best on it, at 17.56:1.
| Hue family | Blues |
| Lightness | very dark (22%) |
| Chroma | muted (0.049) |
| Temperature | cool |
| Nearest name | Rich Black (#0D1B2A) |
| Black text | 1.19:1 |
| White text | 17.56:1 |
Values
| HEX | #101830 |
| RGB | rgb(16, 24, 48) |
| HSL | hsl(225, 50%, 13%) |
| OKLCH | oklch(21.6% 0.049 268.2) |
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 #101830 | 17.56:1 | AAA | Lc -106.6 | Preferred for body text |
| Black text on #101830 | 1.19:1 | Fails | Lc 0.0 | Not readable |
| #101830 text on white | 17.56:1 | AAA | Lc 104.3 | Preferred for body text |
| #101830 text on black | 1.19:1 | 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
#E5EAF5
oklch(93.6% 0.016 266.3)
-
Step 200
200
#D0D9EF
oklch(88.5% 0.032 268)
-
Step 300
300
#B1C0E7
oklch(80.9% 0.058 268.6)
-
Step 400
400
#889FDB
oklch(70.8% 0.092 267.9)
-
Step 500
500
#6B86D1
oklch(63.2% 0.118 267.9)
-
Step 600
600
#536EBE
oklch(55.6% 0.128 268)
-
Step 700
700
#445CA4
oklch(49.2% 0.119 268)
-
Step 800
800
#384B85
oklch(42.7% 0.099 268.3)
-
Step 900
900
#303F6A
oklch(37.6% 0.076 268.1)
-
Step 950
950 (this color)
#101830
oklch(21.6% 0.049 268.2)
#101830 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) | #0E1B31 | 0.010 |
| Deuteranopia (no green cones) | #0A182F | 0.009 |
| Tritanopia (no blue cones) | #021D21 | 0.043 |
| Achromatopsia (no color) | #191919 | 0.049 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #101830
#101830
oklch(21.6% 0.049 268.2)
- #221800
#221800
oklch(21.6% 0.044 88)
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 #101830, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rich Black #0D1B2A ΔE 0.018
- Dark #1B2431 ΔE 0.048
- Oxford Blue #1B263B ΔE 0.054
- Navy Blue #001146 ΔE 0.054
- Rich Navy #001219 ΔE 0.058
- Jet #212529 ΔE 0.061
- Dark Navy #000435 ΔE 0.073
- Night Blue #040348 ΔE 0.075
Use #101830 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.