#033139
Closest named color: Oxford Blue (#1B263B). oklch(28.8% 0.048 212.6), rgb(3, 49, 57).
Aa
White text reads best on this color (13.97:1).
About this color
#033139 is a dark, muted teal or cyan. In OKLCH its lightness is 29%, its chroma 0.048 and its hue 213°. Its hue sits on the cool side of the wheel. The nearest named color is Oxford Blue (#1B263B), ΔE 0.043 away. White text reads best on it, at 13.97:1.
| Hue family | Teals and cyans |
| Lightness | dark (29%) |
| Chroma | muted (0.048) |
| Temperature | cool |
| Nearest name | Oxford Blue (#1B263B) |
| Black text | 1.50:1 |
| White text | 13.97:1 |
Values
| HEX | #033139 |
| RGB | rgb(3, 49, 57) |
| HSL | hsl(189, 90%, 12%) |
| OKLCH | oklch(28.8% 0.048 212.6) |
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 #033139 | 13.97:1 | AAA | Lc -103.4 | Preferred for body text |
| Black text on #033139 | 1.50:1 | Fails | Lc 0.0 | Not readable |
| #033139 text on white | 13.97:1 | AAA | Lc 100.3 | Preferred for body text |
| #033139 text on black | 1.50:1 | 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
#F0F7F8
oklch(97.1% 0.008 207.1)
-
Step 100
100
#DEEDF0
oklch(93.6% 0.016 211)
-
Step 200
200
#C2DFE6
oklch(88.5% 0.032 213.9)
-
Step 300
300
#96CBD6
oklch(80.9% 0.057 211.9)
-
Step 400
400
#53B0C2
oklch(70.8% 0.091 212.1)
-
Step 500
500
#009AB1
oklch(63% 0.11 213.1)
-
Step 600
600
#008295
oklch(55.7% 0.097 212.5)
-
Step 700
700
#006D7D
oklch(49.1% 0.086 212.3)
-
Step 800
800
#005967
oklch(42.6% 0.075 213)
-
Step 900
900
#004A56
oklch(37.6% 0.066 213)
-
Step 950
950 (this color)
#033139
oklch(28.8% 0.048 212.6)
#033139 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) | #2B2F39 | 0.044 |
| Deuteranopia (no green cones) | #242A39 | 0.040 |
| Tritanopia (no blue cones) | #003433 | 0.018 |
| Achromatopsia (no color) | #2C2C2C | 0.049 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #033139
#033139
oklch(28.8% 0.048 212.6)
- #40211B
#40211B
oklch(28.8% 0.049 31.9)
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 #033139, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Oxford Blue #1B263B ΔE 0.043
- Midnight Green #073B4C ΔE 0.044
- Gunmetal #293241 ΔE 0.045
- Dark #1B2431 ΔE 0.046
- Jet #212529 ΔE 0.049
- Space Cadet #2B2D42 ΔE 0.051
- Dark Blue Grey #1F3B4D ΔE 0.055
- Prussian Blue #1D3557 ΔE 0.062
Use #033139 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.