#121331
Closest named color: Rich Black (#0D1B2A). oklch(20.5% 0.058 278.5), rgb(18, 19, 49).
Aa
White text reads best on this color (18.05:1).
About this color
#121331 is a very dark, muted blue. In OKLCH its lightness is 21%, its chroma 0.058 and its hue 279°. Its hue sits on the cool side of the wheel. The nearest named color is Rich Black (#0D1B2A), ΔE 0.034 away. White text reads best on it, at 18.05:1.
| Hue family | Blues |
| Lightness | very dark (21%) |
| Chroma | muted (0.058) |
| Temperature | cool |
| Nearest name | Rich Black (#0D1B2A) |
| Black text | 1.16:1 |
| White text | 18.05:1 |
Values
| HEX | #121331 |
| RGB | rgb(18, 19, 49) |
| HSL | hsl(238, 46%, 13%) |
| OKLCH | oklch(20.5% 0.058 278.5) |
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 #121331 | 18.05:1 | AAA | Lc -106.9 | Preferred for body text |
| Black text on #121331 | 1.16:1 | Fails | Lc 0.0 | Not readable |
| #121331 text on white | 18.05:1 | AAA | Lc 104.7 | Preferred for body text |
| #121331 text on black | 1.16:1 | 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
#F4F5FC
oklch(97.1% 0.009 279.7)
-
Step 100
100
#E6E9F8
oklch(93.6% 0.02 276.9)
-
Step 200
200
#D3D7F3
oklch(88.5% 0.039 279.1)
-
Step 300
300
#B6BDED
oklch(80.9% 0.068 278.3)
-
Step 400
400
#9199E5
oklch(70.7% 0.111 278.5)
-
Step 500
500
#787EDD
oklch(63.1% 0.141 278.8)
-
Step 600
600
#6265CA
oklch(55.5% 0.153 278.9)
-
Step 700
700
#5154AF
oklch(49.2% 0.142 278.4)
-
Step 800
800
#42458E
oklch(42.7% 0.118 278.4)
-
Step 900
900
#373B71
oklch(37.7% 0.091 277.9)
-
Step 950
950 (this color)
#121331
oklch(20.5% 0.058 278.5)
#121331 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) | #051832 | 0.023 |
| Deuteranopia (no green cones) | #031530 | 0.023 |
| Tritanopia (no blue cones) | #051A1F | 0.052 |
| Achromatopsia (no color) | #161616 | 0.059 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #121331
#121331
oklch(20.5% 0.058 278.5)
- #1C1700
#1C1700
oklch(20.4% 0.042 98.7)
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 #121331, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rich Black #0D1B2A ΔE 0.034
- Navy Blue #001146 ΔE 0.049
- Rich Navy #001219 ΔE 0.060
- Dark Navy #000435 ΔE 0.062
- Dark #1B2431 ΔE 0.062
- Midnight Purple #280137 ΔE 0.063
- Night Blue #040348 ΔE 0.065
- Very Dark Purple #2A0134 ΔE 0.066
Use #121331 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.