#15213F
Closest named color: Oxford Blue (#1B263B). oklch(25.4% 0.059 265.9), rgb(21, 33, 63).
Aa
White text reads best on this color (15.89:1).
About this color
#15213F is a dark, muted blue. In OKLCH its lightness is 25%, its chroma 0.059 and its hue 266°. Its hue sits on the cool side of the wheel. The nearest named color is Oxford Blue (#1B263B), ΔE 0.023 away. White text reads best on it, at 15.89:1.
| Hue family | Blues |
| Lightness | dark (25%) |
| Chroma | muted (0.059) |
| Temperature | cool |
| Nearest name | Oxford Blue (#1B263B) |
| Black text | 1.32:1 |
| White text | 15.89:1 |
Values
| HEX | #15213F |
| RGB | rgb(21, 33, 63) |
| HSL | hsl(223, 50%, 16%) |
| OKLCH | oklch(25.4% 0.059 265.9) |
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 #15213F | 15.89:1 | AAA | Lc -105.3 | Preferred for body text |
| Black text on #15213F | 1.32:1 | Fails | Lc 0.0 | Not readable |
| #15213F text on white | 15.89:1 | AAA | Lc 102.7 | Preferred for body text |
| #15213F text on black | 1.32:1 | 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
#F2F5FC
oklch(97% 0.01 267.4)
-
Step 100
100
#E3EAF8
oklch(93.6% 0.02 264.5)
-
Step 200
200
#CDD9F4
oklch(88.5% 0.039 266.5)
-
Step 300
300
#ABC0EF
oklch(80.8% 0.071 266)
-
Step 400
400
#7F9FE7
oklch(70.8% 0.112 265.4)
-
Step 500
500
#6085E0
oklch(63.2% 0.143 265.8)
-
Step 600
600
#486CCE
oklch(55.6% 0.157 266.2)
-
Step 700
700
#395AB2
oklch(49.1% 0.145 265.8)
-
Step 800
800
#2F4A90
oklch(42.7% 0.12 265.7)
-
Step 900
900
#2A3E73
oklch(37.6% 0.094 266.4)
-
Step 950
950 (this color)
#15213F
oklch(25.4% 0.059 265.9)
#15213F 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) | #142440 | 0.010 |
| Deuteranopia (no green cones) | #0E203E | 0.010 |
| Tritanopia (no blue cones) | #00282C | 0.054 |
| Achromatopsia (no color) | #222222 | 0.059 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #15213F
#15213F
oklch(25.4% 0.059 265.9)
- #2E2000
#2E2000
oklch(25.4% 0.052 84.7)
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 #15213F, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Oxford Blue #1B263B ΔE 0.023
- Dark #1B2431 ΔE 0.032
- Rich Black #0D1B2A ΔE 0.045
- Jet #212529 ΔE 0.051
- Space Cadet #2B2D42 ΔE 0.056
- Navy Blue #001146 ΔE 0.062
- Marine #042E60 ΔE 0.067
- Gunmetal #293241 ΔE 0.068
Use #15213F 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.