#02739B
Closest named color: Ocean Blue (#03719C). oklch(52.2% 0.105 231.6), rgb(2, 115, 155).
Aa
White text reads best on this color (5.34:1).
About this color
#02739B is a medium-dark, moderately saturated blue. In OKLCH its lightness is 52%, its chroma 0.105 and its hue 232°. Its hue sits on the cool side of the wheel. The nearest named color is Ocean Blue (#03719C), ΔE 0.007 away. White text reads best on it, at 5.34:1.
| Hue family | Blues |
| Lightness | medium-dark (52%) |
| Chroma | moderately saturated (0.105) |
| Temperature | cool |
| Nearest name | Ocean Blue (#03719C) |
| Black text | 3.92:1 |
| White text | 5.34:1 |
Values
| HEX | #02739B |
| RGB | rgb(2, 115, 155) |
| HSL | hsl(196, 97%, 31%) |
| OKLCH | oklch(52.2% 0.105 231.6) |
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 #02739B | 5.34:1 | AA | Lc -81.4 | Fine for body text |
| Black text on #02739B | 3.92:1 | AA large text | Lc 28.0 | Dividers and decoration only |
| #02739B text on white | 5.34:1 | AA | Lc 76.0 | Fine for body text |
| #02739B text on black | 3.92:1 | AA large text | Lc -25.7 | Dividers and decoration only |
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 700.
-
Step 50
50
#F1F6F9
oklch(97% 0.007 233.6)
-
Step 100
100
#E1ECF2
oklch(93.7% 0.014 231.2)
-
Step 200
200
#C7DDE9
oklch(88.5% 0.029 231.5)
-
Step 300
300
#A0C7DC
oklch(80.8% 0.051 231.7)
-
Step 400
400
#69AACB
oklch(70.7% 0.082 231.7)
-
Step 500
500
#3A94BD
oklch(63% 0.104 231.6)
-
Step 600
600
#007EA9
oklch(55.6% 0.112 231.2)
-
Step 700
700 (this color)
#02739B
oklch(52.2% 0.105 231.6)
-
Step 800
800
#005676
oklch(42.6% 0.087 232.3)
-
Step 900
900
#10485F
oklch(37.8% 0.068 230.5)
-
Step 950
950
#0C2A38
oklch(27% 0.044 231.9)
#02739B 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) | #5F729D | 0.070 |
| Deuteranopia (no green cones) | #4C659A | 0.058 |
| Tritanopia (no blue cones) | #007E81 | 0.061 |
| Achromatopsia (no color) | #6B6B6B | 0.106 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #02739B
#02739B
oklch(52.2% 0.105 231.6)
- #98562A
#98562A
oklch(52.2% 0.105 52)
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 #02739B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Ocean Blue #03719C ΔE 0.007
- Sea Blue #047495 ΔE 0.011
- Muted Blue #3B719F ΔE 0.030
- Ocean #017B92 ΔE 0.032
- Peacock Blue #016795 ΔE 0.036
- Nice Blue #107AB0 ΔE 0.037
- Flat Blue #3C73A8 ΔE 0.038
- Dull Blue #49759C ΔE 0.044
Use #02739B 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.