#03213E
Closest named color: Oxford Blue (#1B263B). oklch(24.4% 0.066 251), rgb(3, 33, 62).
Aa
White text reads best on this color (16.26:1).
About this color
#03213E is a very dark, muted blue. In OKLCH its lightness is 24%, its chroma 0.066 and its hue 251°. Its hue sits on the cool side of the wheel. The nearest named color is Oxford Blue (#1B263B), ΔE 0.036 away. White text reads best on it, at 16.26:1.
| Hue family | Blues |
| Lightness | very dark (24%) |
| Chroma | muted (0.066) |
| Temperature | cool |
| Nearest name | Oxford Blue (#1B263B) |
| Black text | 1.29:1 |
| White text | 16.26:1 |
Values
| HEX | #03213E |
| RGB | rgb(3, 33, 62) |
| HSL | hsl(209, 91%, 13%) |
| OKLCH | oklch(24.4% 0.066 251) |
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 #03213E | 16.26:1 | AAA | Lc -105.5 | Preferred for body text |
| Black text on #03213E | 1.29:1 | Fails | Lc 0.0 | Not readable |
| #03213E text on white | 16.26:1 | AAA | Lc 103.0 | Preferred for body text |
| #03213E text on black | 1.29:1 | 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
#F0F6FC
oklch(97% 0.01 247.9)
-
Step 100
100
#DFEBF9
oklch(93.5% 0.023 252.2)
-
Step 200
200
#C5DCF5
oklch(88.5% 0.042 250.5)
-
Step 300
300
#9CC5F2
oklch(81% 0.078 251.1)
-
Step 400
400
#62A5EB
oklch(70.7% 0.124 250.9)
-
Step 500
500
#2E8CE5
oklch(63% 0.159 251.1)
-
Step 600
600
#0075CD
oklch(55.6% 0.161 250.9)
-
Step 700
700
#0062AE
oklch(49.1% 0.143 251.1)
-
Step 800
800
#005090
oklch(42.7% 0.125 251.1)
-
Step 900
900
#084376
oklch(37.8% 0.103 250.9)
-
Step 950
950 (this color)
#03213E
oklch(24.4% 0.066 251)
#03213E 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) | #13233F | 0.019 |
| Deuteranopia (no green cones) | #081E3D | 0.010 |
| Tritanopia (no blue cones) | #00282C | 0.048 |
| Achromatopsia (no color) | #202020 | 0.066 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #03213E
#03213E
oklch(24.4% 0.066 251)
- #301B00
#301B00
oklch(24.4% 0.053 70.1)
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 #03213E, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Oxford Blue #1B263B ΔE 0.036
- Rich Black #0D1B2A ΔE 0.040
- Dark #1B2431 ΔE 0.040
- Navy Blue #001146 ΔE 0.053
- Jet #212529 ΔE 0.059
- Space Cadet #2B2D42 ΔE 0.071
- Marine #042E60 ΔE 0.071
- Dark Indigo #1F0954 ΔE 0.078
Use #03213E 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.