#121E30
Closest named color: Rich Black (#0D1B2A). oklch(23.4% 0.039 258.3), rgb(18, 30, 48).
Aa
White text reads best on this color (16.74:1).
About this color
#121E30 is a very dark, muted blue. In OKLCH its lightness is 23%, its chroma 0.039 and its hue 258°. Its hue sits on the cool side of the wheel. The nearest named color is Rich Black (#0D1B2A), ΔE 0.017 away. White text reads best on it, at 16.74:1.
| Hue family | Blues |
| Lightness | very dark (23%) |
| Chroma | muted (0.039) |
| Temperature | cool |
| Nearest name | Rich Black (#0D1B2A) |
| Black text | 1.25:1 |
| White text | 16.74:1 |
Values
| HEX | #121E30 |
| RGB | rgb(18, 30, 48) |
| HSL | hsl(216, 45%, 13%) |
| OKLCH | oklch(23.4% 0.039 258.3) |
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 #121E30 | 16.74:1 | AAA | Lc -106.0 | Preferred for body text |
| Black text on #121E30 | 1.25:1 | Fails | Lc 0.0 | Not readable |
| #121E30 text on white | 16.74:1 | AAA | Lc 103.6 | Preferred for body text |
| #121E30 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
#E4EAF3
oklch(93.5% 0.014 258.3)
-
Step 200
200
#CFDAEA
oklch(88.5% 0.025 257.6)
-
Step 300
300
#AFC2DF
oklch(80.9% 0.046 258.8)
-
Step 400
400
#84A2CF
oklch(70.6% 0.074 258.3)
-
Step 500
500
#658BC2
oklch(63.1% 0.094 257.6)
-
Step 600
600
#4D74AF
oklch(55.7% 0.102 258.4)
-
Step 700
700
#3D6196
oklch(49.1% 0.095 257.9)
-
Step 800
800
#334F7A
oklch(42.6% 0.08 258.7)
-
Step 900
900
#2D4262
oklch(37.7% 0.061 258.6)
-
Step 950
950 (this color)
#121E30
oklch(23.4% 0.039 258.3)
#121E30 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) | #171F31 | 0.009 |
| Deuteranopia (no green cones) | #131C30 | 0.007 |
| Tritanopia (no blue cones) | #042224 | 0.036 |
| Achromatopsia (no color) | #1E1E1E | 0.039 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #121E30
#121E30
oklch(23.4% 0.039 258.3)
- #281B06
#281B06
oklch(23.3% 0.039 77.2)
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 #121E30, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rich Black #0D1B2A ΔE 0.017
- Dark #1B2431 ΔE 0.027
- Oxford Blue #1B263B ΔE 0.036
- Jet #212529 ΔE 0.041
- Navy Blue #001146 ΔE 0.068
- Rich Navy #001219 ΔE 0.068
- Space Cadet #2B2D42 ΔE 0.073
- Gunmetal #293241 ΔE 0.082
Use #121E30 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.