#121333
Closest named color: Rich Black (#0D1B2A). oklch(20.7% 0.062 278.2), rgb(18, 19, 51).
Aa
White text reads best on this color (17.99:1).
About this color
#121333 is a very dark, muted blue. In OKLCH its lightness is 21%, its chroma 0.062 and its hue 278°. Its hue sits on the cool side of the wheel. The nearest named color is Rich Black (#0D1B2A), ΔE 0.036 away. White text reads best on it, at 17.99:1.
| Hue family | Blues |
| Lightness | very dark (21%) |
| Chroma | muted (0.062) |
| Temperature | cool |
| Nearest name | Rich Black (#0D1B2A) |
| Black text | 1.16:1 |
| White text | 17.99:1 |
Values
| HEX | #121333 |
| RGB | rgb(18, 19, 51) |
| HSL | hsl(238, 48%, 14%) |
| OKLCH | oklch(20.7% 0.062 278.2) |
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 #121333 | 17.99:1 | AAA | Lc -106.8 | Preferred for body text |
| Black text on #121333 | 1.16:1 | Fails | Lc 0.0 | Not readable |
| #121333 text on white | 17.99:1 | AAA | Lc 104.6 | Preferred for body text |
| #121333 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
#D2D7F4
oklch(88.4% 0.04 277.8)
-
Step 300
300
#B5BDF0
oklch(81% 0.073 277.7)
-
Step 400
400
#9099E9
oklch(70.8% 0.117 278.1)
-
Step 500
500
#767DE2
oklch(63.1% 0.15 278.2)
-
Step 600
600
#6064D0
oklch(55.6% 0.163 278.1)
-
Step 700
700
#5052B4
oklch(49.1% 0.152 278.3)
-
Step 800
800
#414492
oklch(42.7% 0.126 278)
-
Step 900
900
#373A74
oklch(37.7% 0.097 278.4)
-
Step 950
950 (this color)
#121333
oklch(20.7% 0.062 278.2)
#121333 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) | #031834 | 0.024 |
| Deuteranopia (no green cones) | #011532 | 0.026 |
| Tritanopia (no blue cones) | #041A20 | 0.054 |
| Achromatopsia (no color) | #171717 | 0.062 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #121333
#121333
oklch(20.7% 0.062 278.2)
- #1D1800
#1D1800
oklch(20.9% 0.043 99)
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 #121333, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rich Black #0D1B2A ΔE 0.036
- Navy Blue #001146 ΔE 0.046
- Dark Navy #000435 ΔE 0.061
- Night Blue #040348 ΔE 0.062
- Midnight Purple #280137 ΔE 0.062
- Dark #1B2431 ΔE 0.063
- Rich Navy #001219 ΔE 0.064
- Very Dark Purple #2A0134 ΔE 0.066
Use #121333 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.