#121D35
Closest named color: Rich Black (#0D1B2A). oklch(23.4% 0.049 264.3), rgb(18, 29, 53).
Aa
White text reads best on this color (16.76:1).
About this color
#121D35 is a very dark, muted blue. In OKLCH its lightness is 23%, its chroma 0.049 and its hue 264°. Its hue sits on the cool side of the wheel. The nearest named color is Rich Black (#0D1B2A), ΔE 0.023 away. White text reads best on it, at 16.76:1.
| Hue family | Blues |
| Lightness | very dark (23%) |
| Chroma | muted (0.049) |
| Temperature | cool |
| Nearest name | Rich Black (#0D1B2A) |
| Black text | 1.25:1 |
| White text | 16.76:1 |
Values
| HEX | #121D35 |
| RGB | rgb(18, 29, 53) |
| HSL | hsl(221, 49%, 14%) |
| OKLCH | oklch(23.4% 0.049 264.3) |
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 #121D35 | 16.76:1 | AAA | Lc -106.0 | Preferred for body text |
| Black text on #121D35 | 1.25:1 | Fails | Lc 0.0 | Not readable |
| #121D35 text on white | 16.76:1 | AAA | Lc 103.6 | Preferred for body text |
| #121D35 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
#F3F5FB
oklch(97% 0.008 271.3)
-
Step 100
100
#E4EAF6
oklch(93.6% 0.017 264.5)
-
Step 200
200
#CED9EF
oklch(88.4% 0.033 264.4)
-
Step 300
300
#AEC1E7
oklch(80.9% 0.058 264.2)
-
Step 400
400
#83A0DB
oklch(70.7% 0.093 264)
-
Step 500
500
#6587D1
oklch(63% 0.119 264.5)
-
Step 600
600
#4C70BF
oklch(55.7% 0.13 264.2)
-
Step 700
700
#3D5DA4
oklch(49% 0.12 264.2)
-
Step 800
800
#334C85
oklch(42.6% 0.1 264.7)
-
Step 900
900
#2C406B
oklch(37.7% 0.078 264.1)
-
Step 950
950 (this color)
#121D35
oklch(23.4% 0.049 264.3)
#121D35 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) | #131F36 | 0.007 |
| Deuteranopia (no green cones) | #0F1C34 | 0.006 |
| Tritanopia (no blue cones) | #012226 | 0.044 |
| Achromatopsia (no color) | #1E1E1E | 0.049 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #121D35
#121D35
oklch(23.4% 0.049 264.3)
- #281C00
#281C00
oklch(23.5% 0.048 86.2)
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 #121D35, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rich Black #0D1B2A ΔE 0.023
- Dark #1B2431 ΔE 0.032
- Oxford Blue #1B263B ΔE 0.036
- Jet #212529 ΔE 0.049
- Navy Blue #001146 ΔE 0.058
- Space Cadet #2B2D42 ΔE 0.072
- Rich Navy #001219 ΔE 0.073
- Dark Indigo #1F0954 ΔE 0.078
Use #121D35 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.