#121C38
Closest named color: Rich Black (#0D1B2A). oklch(23.4% 0.056 267.2), rgb(18, 28, 56).
Aa
White text reads best on this color (16.81:1).
About this color
#121C38 is a very dark, muted blue. In OKLCH its lightness is 23%, its chroma 0.056 and its hue 267°. Its hue sits on the cool side of the wheel. The nearest named color is Rich Black (#0D1B2A), ΔE 0.029 away. White text reads best on it, at 16.81:1.
| Hue family | Blues |
| Lightness | very dark (23%) |
| Chroma | muted (0.056) |
| Temperature | cool |
| Nearest name | Rich Black (#0D1B2A) |
| Black text | 1.24:1 |
| White text | 16.81:1 |
Values
| HEX | #121C38 |
| RGB | rgb(18, 28, 56) |
| HSL | hsl(224, 51%, 15%) |
| OKLCH | oklch(23.4% 0.056 267.2) |
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 #121C38 | 16.81:1 | AAA | Lc -106.1 | Preferred for body text |
| Black text on #121C38 | 1.24:1 | Fails | Lc 0.0 | Not readable |
| #121C38 text on white | 16.81:1 | AAA | Lc 103.6 | Preferred for body text |
| #121C38 text on black | 1.24:1 | 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
#F3F5FC
oklch(97.1% 0.01 273.4)
-
Step 100
100
#E4EAF7
oklch(93.6% 0.019 266)
-
Step 200
200
#CED9F2
oklch(88.5% 0.036 266.7)
-
Step 300
300
#AEC0EC
oklch(80.9% 0.066 267.5)
-
Step 400
400
#839EE3
oklch(70.6% 0.106 267.3)
-
Step 500
500
#6585DB
oklch(63.2% 0.135 267.1)
-
Step 600
600
#4D6DC9
oklch(55.7% 0.147 267.1)
-
Step 700
700
#3E5AAE
oklch(49.1% 0.138 267.3)
-
Step 800
800
#334A8C
oklch(42.6% 0.113 267.1)
-
Step 900
900
#2D3E70
oklch(37.6% 0.088 267.9)
-
Step 950
950 (this color)
#121C38
oklch(23.4% 0.056 267.2)
#121C38 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) | #101F39 | 0.010 |
| Deuteranopia (no green cones) | #0B1C37 | 0.009 |
| Tritanopia (no blue cones) | #002227 | 0.049 |
| Achromatopsia (no color) | #1D1D1D | 0.056 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #121C38
#121C38
oklch(23.4% 0.056 267.2)
- #271C00
#271C00
oklch(23.3% 0.048 88.1)
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 #121C38, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rich Black #0D1B2A ΔE 0.029
- Dark #1B2431 ΔE 0.038
- Oxford Blue #1B263B ΔE 0.038
- Navy Blue #001146 ΔE 0.052
- Jet #212529 ΔE 0.055
- Dark Indigo #1F0954 ΔE 0.071
- Space Cadet #2B2D42 ΔE 0.074
- Rich Navy #001219 ΔE 0.076
Use #121C38 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.