#03303E
Closest named color: Oxford Blue (#1B263B). oklch(28.8% 0.052 224.4), rgb(3, 48, 62).
Aa
White text reads best on this color (14.03:1).
About this color
#03303E is a dark, muted teal or cyan. In OKLCH its lightness is 29%, its chroma 0.052 and its hue 224°. Its hue sits on the cool side of the wheel. The nearest named color is Oxford Blue (#1B263B), ΔE 0.037 away. White text reads best on it, at 14.03:1.
| Hue family | Teals and cyans |
| Lightness | dark (29%) |
| Chroma | muted (0.052) |
| Temperature | cool |
| Nearest name | Oxford Blue (#1B263B) |
| Black text | 1.49:1 |
| White text | 14.03:1 |
Values
| HEX | #03303E |
| RGB | rgb(3, 48, 62) |
| HSL | hsl(194, 91%, 13%) |
| OKLCH | oklch(28.8% 0.052 224.4) |
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 #03303E | 14.03:1 | AAA | Lc -103.5 | Preferred for body text |
| Black text on #03303E | 1.49:1 | Fails | Lc 0.0 | Not readable |
| #03303E text on white | 14.03:1 | AAA | Lc 100.4 | Preferred for body text |
| #03303E text on black | 1.49:1 | 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
#F0F7FA
oklch(97.2% 0.008 225.1)
-
Step 100
100
#DEEDF3
oklch(93.7% 0.018 223.6)
-
Step 200
200
#C2DFEA
oklch(88.6% 0.034 222.7)
-
Step 300
300
#96CADF
oklch(81% 0.062 224.8)
-
Step 400
400
#52AECE
oklch(70.8% 0.099 223.7)
-
Step 500
500
#0098BF
oklch(63.2% 0.119 224.4)
-
Step 600
600
#007FA1
oklch(55.5% 0.105 225)
-
Step 700
700
#006B88
oklch(49.1% 0.093 224.9)
-
Step 800
800
#005870
oklch(42.8% 0.081 224.4)
-
Step 900
900
#00495E
oklch(37.7% 0.071 225)
-
Step 950
950 (this color)
#03303E
oklch(28.8% 0.052 224.4)
#03303E 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) | #282F3F | 0.040 |
| Deuteranopia (no green cones) | #20293E | 0.035 |
| Tritanopia (no blue cones) | #003435 | 0.025 |
| Achromatopsia (no color) | #2C2C2C | 0.052 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #03303E
#03303E
oklch(28.8% 0.052 224.4)
- #402214
#402214
oklch(28.9% 0.052 45.2)
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 #03303E, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Oxford Blue #1B263B ΔE 0.037
- Midnight Green #073B4C ΔE 0.042
- Gunmetal #293241 ΔE 0.043
- Dark #1B2431 ΔE 0.044
- Space Cadet #2B2D42 ΔE 0.047
- Jet #212529 ΔE 0.051
- Dark Blue Grey #1F3B4D ΔE 0.052
- Prussian Blue #1D3557 ΔE 0.054
Use #03303E 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.