#121F34
Closest named color: Rich Black (#0D1B2A). oklch(23.9% 0.045 259.6), rgb(18, 31, 52).
Aa
White text reads best on this color (16.51:1).
About this color
#121F34 is a very dark, muted blue. In OKLCH its lightness is 24%, its chroma 0.045 and its hue 260°. Its hue sits on the cool side of the wheel. The nearest named color is Rich Black (#0D1B2A), ΔE 0.024 away. White text reads best on it, at 16.51:1.
| Hue family | Blues |
| Lightness | very dark (24%) |
| Chroma | muted (0.045) |
| Temperature | cool |
| Nearest name | Rich Black (#0D1B2A) |
| Black text | 1.27:1 |
| White text | 16.51:1 |
Values
| HEX | #121F34 |
| RGB | rgb(18, 31, 52) |
| HSL | hsl(217, 49%, 14%) |
| OKLCH | oklch(23.9% 0.045 259.6) |
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 #121F34 | 16.51:1 | AAA | Lc -105.9 | Preferred for body text |
| Black text on #121F34 | 1.27:1 | Fails | Lc 0.0 | Not readable |
| #121F34 text on white | 16.51:1 | AAA | Lc 103.4 | Preferred for body text |
| #121F34 text on black | 1.27:1 | 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
#ADC2E3
oklch(80.9% 0.052 259.4)
-
Step 400
400
#81A2D6
oklch(70.7% 0.085 259.3)
-
Step 500
500
#628ACA
oklch(63.1% 0.107 259.5)
-
Step 600
600
#4873B7
oklch(55.6% 0.117 259.2)
-
Step 700
700
#3A609E
oklch(49.2% 0.109 259.7)
-
Step 800
800
#304F80
oklch(42.8% 0.09 259.2)
-
Step 900
900
#2B4267
oklch(37.9% 0.07 259.6)
-
Step 950
950 (this color)
#121F34
oklch(23.9% 0.045 259.6)
#121F34 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) | #172135 | 0.011 |
| Deuteranopia (no green cones) | #121D34 | 0.007 |
| Tritanopia (no blue cones) | #012427 | 0.040 |
| Achromatopsia (no color) | #1F1F1F | 0.045 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #121F34
#121F34
oklch(23.9% 0.045 259.6)
- #2A1C03
#2A1C03
oklch(23.8% 0.045 79.4)
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 #121F34, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rich Black #0D1B2A ΔE 0.024
- Dark #1B2431 ΔE 0.025
- Oxford Blue #1B263B ΔE 0.030
- Jet #212529 ΔE 0.042
- Navy Blue #001146 ΔE 0.065
- Space Cadet #2B2D42 ΔE 0.068
- Rich Navy #001219 ΔE 0.075
- Gunmetal #293241 ΔE 0.078
Use #121F34 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.