#101828
Closest named color: Rich Black (#0D1B2A). oklch(21% 0.034 263.4), rgb(16, 24, 40).
Aa
White text reads best on this color (17.74:1).
About this color
#101828 is a very dark, muted blue. In OKLCH its lightness is 21%, its chroma 0.034 and its hue 263°. Its hue sits on the cool side of the wheel. The nearest named color is Rich Black (#0D1B2A), ΔE 0.011 away. White text reads best on it, at 17.74:1.
| Hue family | Blues |
| Lightness | very dark (21%) |
| Chroma | muted (0.034) |
| Temperature | cool |
| Nearest name | Rich Black (#0D1B2A) |
| Black text | 1.18:1 |
| White text | 17.74:1 |
Values
| HEX | #101828 |
| RGB | rgb(16, 24, 40) |
| HSL | hsl(220, 43%, 11%) |
| OKLCH | oklch(21% 0.034 263.4) |
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 #101828 | 17.74:1 | AAA | Lc -106.7 | Preferred for body text |
| Black text on #101828 | 1.18:1 | Fails | Lc 0.0 | Not readable |
| #101828 text on white | 17.74:1 | AAA | Lc 104.5 | Preferred for body text |
| #101828 text on black | 1.18:1 | 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
#F3F5F9
oklch(97% 0.006 264.5)
-
Step 100
100
#E6EAF2
oklch(93.6% 0.012 264.5)
-
Step 200
200
#D1D9E8
oklch(88.4% 0.022 263.2)
-
Step 300
300
#B3C1DC
oklch(80.9% 0.041 263.6)
-
Step 400
400
#8CA1CA
oklch(70.8% 0.065 263.6)
-
Step 500
500
#6F89BC
oklch(63% 0.083 263.4)
-
Step 600
600
#5872A8
oklch(55.5% 0.09 264.1)
-
Step 700
700
#486090
oklch(49.1% 0.083 263.4)
-
Step 800
800
#3B4E75
oklch(42.6% 0.069 263.9)
-
Step 900
900
#33415E
oklch(37.6% 0.053 264.2)
-
Step 950
950 (this color)
#101828
oklch(21% 0.034 263.4)
#101828 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) | #121929 | 0.005 |
| Deuteranopia (no green cones) | #0F1728 | 0.004 |
| Tritanopia (no blue cones) | #071B1E | 0.029 |
| Achromatopsia (no color) | #181818 | 0.034 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #101828
#101828
oklch(21% 0.034 263.4)
- #201705
#201705
oklch(21.1% 0.034 83.5)
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 #101828, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rich Black #0D1B2A ΔE 0.011
- Rich Navy #001219 ΔE 0.047
- Dark #1B2431 ΔE 0.049
- Jet #212529 ΔE 0.058
- Oxford Blue #1B263B ΔE 0.060
- Almost Black #070D0D ΔE 0.066
- Navy Blue #001146 ΔE 0.068
- Dark Navy #000435 ΔE 0.079
Use #101828 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.