#101121
Closest named color: Rich Navy (#001219). oklch(18.6% 0.033 280), rgb(16, 17, 33).
Aa
White text reads best on this color (18.68:1).
About this color
#101121 is a very dark, muted blue. In OKLCH its lightness is 19%, its chroma 0.033 and its hue 280°. Its hue sits on the cool side of the wheel. The nearest named color is Rich Navy (#001219), ΔE 0.035 away. White text reads best on it, at 18.68:1.
| Hue family | Blues |
| Lightness | very dark (19%) |
| Chroma | muted (0.033) |
| Temperature | cool |
| Nearest name | Rich Navy (#001219) |
| Black text | 1.12:1 |
| White text | 18.68:1 |
Values
| HEX | #101121 |
| RGB | rgb(16, 17, 33) |
| HSL | hsl(236, 35%, 10%) |
| OKLCH | oklch(18.6% 0.033 280) |
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 #101121 | 18.68:1 | AAA | Lc -107.3 | Preferred for body text |
| Black text on #101121 | 1.12:1 | Fails | Lc 0.0 | Not readable |
| #101121 text on white | 18.68:1 | AAA | Lc 105.2 | Preferred for body text |
| #101121 text on black | 1.12:1 | 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
#F5F5F9
oklch(97.1% 0.005 286.3)
-
Step 100
100
#E8E9F1
oklch(93.6% 0.011 280.5)
-
Step 200
200
#D6D8E7
oklch(88.5% 0.021 279.9)
-
Step 300
300
#BBBEDA
oklch(80.8% 0.039 280.6)
-
Step 400
400
#989DC7
oklch(70.7% 0.062 279.4)
-
Step 500
500
#8084B9
oklch(63.1% 0.08 280.5)
-
Step 600
600
#696DA5
oklch(55.5% 0.087 280)
-
Step 700
700
#585B8D
oklch(49% 0.08 280.4)
-
Step 800
800
#484B73
oklch(42.8% 0.066 279.9)
-
Step 900
900
#3C3F5D
oklch(37.8% 0.051 279.2)
-
Step 950
950 (this color)
#101121
oklch(18.6% 0.033 280)
#101121 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) | #0C1322 | 0.009 |
| Deuteranopia (no green cones) | #0B1221 | 0.009 |
| Tritanopia (no blue cones) | #0B1417 | 0.028 |
| Achromatopsia (no color) | #121212 | 0.033 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #101121
#101121
oklch(18.6% 0.033 280)
- #161302
#161302
oklch(18.5% 0.034 100.9)
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 #101121, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rich Navy #001219 ΔE 0.035
- Rich Black #0D1B2A ΔE 0.036
- Almost Black #070D0D ΔE 0.047
- Dark Navy #000435 ΔE 0.070
- Midnight #03012D ΔE 0.071
- Dark Navy Blue #00022E ΔE 0.073
- Dark #1B2431 ΔE 0.073
- Navy Blue #001146 ΔE 0.076
Use #101121 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.