#0F213B
Closest named color: Oxford Blue (#1B263B). oklch(24.8% 0.055 257.7), rgb(15, 33, 59).
Aa
White text reads best on this color (16.14:1).
About this color
#0F213B is a very dark, muted blue. In OKLCH its lightness is 25%, its chroma 0.055 and its hue 258°. Its hue sits on the cool side of the wheel. The nearest named color is Oxford Blue (#1B263B), ΔE 0.025 away. White text reads best on it, at 16.14:1.
| Hue family | Blues |
| Lightness | very dark (25%) |
| Chroma | muted (0.055) |
| Temperature | cool |
| Nearest name | Oxford Blue (#1B263B) |
| Black text | 1.30:1 |
| White text | 16.14:1 |
Values
| HEX | #0F213B |
| RGB | rgb(15, 33, 59) |
| HSL | hsl(215, 59%, 15%) |
| OKLCH | oklch(24.8% 0.055 257.7) |
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 #0F213B | 16.14:1 | AAA | Lc -105.5 | Preferred for body text |
| Black text on #0F213B | 1.30:1 | Fails | Lc 0.0 | Not readable |
| #0F213B text on white | 16.14:1 | AAA | Lc 103.0 | Preferred for body text |
| #0F213B 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
#F2F6FB
oklch(97.2% 0.008 253.9)
-
Step 100
100
#E2EBF7
oklch(93.7% 0.019 255.5)
-
Step 200
200
#CBDAF2
oklch(88.5% 0.037 259.8)
-
Step 300
300
#A7C3EB
oklch(81% 0.064 257.3)
-
Step 400
400
#77A2E1
oklch(70.6% 0.104 257.8)
-
Step 500
500
#538AD9
oklch(63.2% 0.133 257.5)
-
Step 600
600
#3772C7
oklch(55.6% 0.146 257.8)
-
Step 700
700
#295FAC
oklch(49.1% 0.136 257.8)
-
Step 800
800
#234E8B
oklch(42.7% 0.112 257.6)
-
Step 900
900
#22416F
oklch(37.6% 0.087 258.2)
-
Step 950
950 (this color)
#0F213B
oklch(24.8% 0.055 257.7)
#0F213B 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) | #16233C | 0.012 |
| Deuteranopia (no green cones) | #0F1F3A | 0.007 |
| Tritanopia (no blue cones) | #00272B | 0.045 |
| Achromatopsia (no color) | #212121 | 0.055 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #0F213B
#0F213B
oklch(24.8% 0.055 257.7)
- #2E1D00
#2E1D00
oklch(24.6% 0.051 77.8)
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 #0F213B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Oxford Blue #1B263B ΔE 0.025
- Dark #1B2431 ΔE 0.029
- Rich Black #0D1B2A ΔE 0.036
- Jet #212529 ΔE 0.048
- Navy Blue #001146 ΔE 0.060
- Space Cadet #2B2D42 ΔE 0.062
- Gunmetal #293241 ΔE 0.072
- Marine #042E60 ΔE 0.074
Use #0F213B 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.