#121E4B
Closest named color: Oxford Blue (#1B263B). oklch(25.5% 0.085 268.5), rgb(18, 30, 75).
Aa
White text reads best on this color (15.99:1).
About this color
#121E4B is a dark, moderately saturated blue. In OKLCH its lightness is 25%, its chroma 0.085 and its hue 268°. Its hue sits on the cool side of the wheel. The nearest named color is Oxford Blue (#1B263B), ΔE 0.045 away. White text reads best on it, at 15.99:1.
| Hue family | Blues |
| Lightness | dark (25%) |
| Chroma | moderately saturated (0.085) |
| Temperature | cool |
| Nearest name | Oxford Blue (#1B263B) |
| Black text | 1.31:1 |
| White text | 15.99:1 |
Values
| HEX | #121E4B |
| RGB | rgb(18, 30, 75) |
| HSL | hsl(227, 61%, 18%) |
| OKLCH | oklch(25.5% 0.085 268.5) |
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 #121E4B | 15.99:1 | AAA | Lc -105.3 | Preferred for body text |
| Black text on #121E4B | 1.31:1 | Fails | Lc 0.0 | Not readable |
| #121E4B text on white | 15.99:1 | AAA | Lc 102.7 | Preferred for body text |
| #121E4B text on black | 1.31:1 | 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
#F1F5FF
oklch(97% 0.014 268.5)
-
Step 100
100
#E2EAFE
oklch(93.7% 0.028 268.4)
-
Step 200
200
#CAD9FF
oklch(88.6% 0.055 268.3)
-
Step 300
300
#A7BFFF
oklch(81% 0.095 268.4)
-
Step 400
400
#799AFF
oklch(70.6% 0.153 268.6)
-
Step 500
500
#587DFF
oklch(63.1% 0.197 268.3)
-
Step 600
600
#3F60F3
oklch(55.6% 0.223 268.3)
-
Step 700
700
#324DD4
oklch(49% 0.208 268.4)
-
Step 800
800
#2A41AB
oklch(42.8% 0.171 268.5)
-
Step 900
900
#253988
oklch(37.9% 0.134 268.5)
-
Step 950
950 (this color)
#121E4B
oklch(25.5% 0.085 268.5)
#121E4B 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) | #01244D | 0.022 |
| Deuteranopia (no green cones) | #001F4A | 0.019 |
| Tritanopia (no blue cones) | #002931 | 0.069 |
| Achromatopsia (no color) | #222222 | 0.085 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #121E4B
#121E4B
oklch(25.5% 0.085 268.5)
- #2D2100
#2D2100
oklch(25.5% 0.052 88.6)
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 #121E4B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Oxford Blue #1B263B ΔE 0.045
- Navy Blue #001146 ΔE 0.049
- Dark Indigo #1F0954 ΔE 0.051
- Marine #042E60 ΔE 0.057
- Dark #1B2431 ΔE 0.058
- Rich Black #0D1B2A ΔE 0.064
- Midnight Blue #191970 ΔE 0.068
- Darkblue #030764 ΔE 0.068
Use #121E4B 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.