#121F44
Closest named color: Oxford Blue (#1B263B). oklch(25.1% 0.072 266.7), rgb(18, 31, 68).
Aa
White text reads best on this color (16.08:1).
About this color
#121F44 is a dark, moderately saturated blue. In OKLCH its lightness is 25%, its chroma 0.072 and its hue 267°. Its hue sits on the cool side of the wheel. The nearest named color is Oxford Blue (#1B263B), ΔE 0.035 away. White text reads best on it, at 16.08:1.
| Hue family | Blues |
| Lightness | dark (25%) |
| Chroma | moderately saturated (0.072) |
| Temperature | cool |
| Nearest name | Oxford Blue (#1B263B) |
| Black text | 1.30:1 |
| White text | 16.08:1 |
Values
| HEX | #121F44 |
| RGB | rgb(18, 31, 68) |
| HSL | hsl(224, 58%, 17%) |
| OKLCH | oklch(25.1% 0.072 266.7) |
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 #121F44 | 16.08:1 | AAA | Lc -105.5 | Preferred for body text |
| Black text on #121F44 | 1.30:1 | Fails | Lc 0.0 | Not readable |
| #121F44 text on white | 16.08:1 | AAA | Lc 102.9 | Preferred for body text |
| #121F44 text on black | 1.30:1 | 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
#F2F5FD
oklch(97% 0.011 269.6)
-
Step 100
100
#E2EAFB
oklch(93.6% 0.025 265.6)
-
Step 200
200
#CBD9F9
oklch(88.5% 0.047 266.7)
-
Step 300
300
#A8C0F9
oklch(81% 0.085 266.8)
-
Step 400
400
#7A9DF5
oklch(70.8% 0.135 266.6)
-
Step 500
500
#5981F2
oklch(63.1% 0.175 266.7)
-
Step 600
600
#4167E0
oklch(55.5% 0.189 266.9)
-
Step 700
700
#3355C3
oklch(49.1% 0.176 266.7)
-
Step 800
800
#2A469D
oklch(42.6% 0.146 266.6)
-
Step 900
900
#263C7D
oklch(37.7% 0.114 266.8)
-
Step 950
950 (this color)
#121F44
oklch(25.1% 0.072 266.7)
#121F44 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) | #0B2345 | 0.014 |
| Deuteranopia (no green cones) | #031F43 | 0.016 |
| Tritanopia (no blue cones) | #00282E | 0.060 |
| Achromatopsia (no color) | #212121 | 0.072 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #121F44
#121F44
oklch(25.1% 0.072 266.7)
- #2D2000
#2D2000
oklch(25.2% 0.052 86.4)
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 #121F44, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Oxford Blue #1B263B ΔE 0.035
- Dark #1B2431 ΔE 0.045
- Navy Blue #001146 ΔE 0.051
- Rich Black #0D1B2A ΔE 0.051
- Dark Indigo #1F0954 ΔE 0.060
- Jet #212529 ΔE 0.064
- Marine #042E60 ΔE 0.064
- Space Cadet #2B2D42 ΔE 0.065
Use #121F44 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.