#121E33
Closest named color: Rich Black (#0D1B2A). oklch(23.6% 0.044 261), rgb(18, 30, 51).
Aa
White text reads best on this color (16.67:1).
About this color
#121E33 is a very dark, muted blue. In OKLCH its lightness is 24%, its chroma 0.044 and its hue 261°. Its hue sits on the cool side of the wheel. The nearest named color is Rich Black (#0D1B2A), ΔE 0.021 away. White text reads best on it, at 16.67:1.
| Hue family | Blues |
| Lightness | very dark (24%) |
| Chroma | muted (0.044) |
| Temperature | cool |
| Nearest name | Rich Black (#0D1B2A) |
| Black text | 1.25:1 |
| White text | 16.67:1 |
Values
| HEX | #121E33 |
| RGB | rgb(18, 30, 51) |
| HSL | hsl(218, 48%, 14%) |
| OKLCH | oklch(23.6% 0.044 261) |
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 #121E33 | 16.67:1 | AAA | Lc -106.0 | Preferred for body text |
| Black text on #121E33 | 1.25:1 | Fails | Lc 0.0 | Not readable |
| #121E33 text on white | 16.67:1 | AAA | Lc 103.5 | Preferred for body text |
| #121E33 text on black | 1.25:1 | 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
#F3F6FA
oklch(97.2% 0.006 255.5)
-
Step 100
100
#E4EAF4
oklch(93.5% 0.015 260.7)
-
Step 200
200
#CEDAED
oklch(88.5% 0.029 259.6)
-
Step 300
300
#AEC2E3
oklch(81% 0.052 260.4)
-
Step 400
400
#83A1D5
oklch(70.6% 0.084 261.2)
-
Step 500
500
#6489CA
oklch(63% 0.107 261.2)
-
Step 600
600
#4B72B7
oklch(55.6% 0.117 261.1)
-
Step 700
700
#3C5F9E
oklch(49% 0.109 261.3)
-
Step 800
800
#324E80
oklch(42.7% 0.09 261.2)
-
Step 900
900
#2C4167
oklch(37.7% 0.071 261.6)
-
Step 950
950 (this color)
#121E33
oklch(23.6% 0.044 261)
#121E33 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) | #162034 | 0.010 |
| Deuteranopia (no green cones) | #121D33 | 0.004 |
| Tritanopia (no blue cones) | #022326 | 0.040 |
| Achromatopsia (no color) | #1E1E1E | 0.044 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #121E33
#121E33
oklch(23.6% 0.044 261)
- #291C03
#291C03
oklch(23.7% 0.044 81.4)
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 #121E33, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rich Black #0D1B2A ΔE 0.021
- Dark #1B2431 ΔE 0.028
- Oxford Blue #1B263B ΔE 0.034
- Jet #212529 ΔE 0.044
- Navy Blue #001146 ΔE 0.063
- Space Cadet #2B2D42 ΔE 0.071
- Rich Navy #001219 ΔE 0.072
- Gunmetal #293241 ΔE 0.081
Use #121E33 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.