#28729C
Closest named color: Ocean Blue (#03719C). oklch(52.6% 0.097 237.9), rgb(40, 114, 156).
Aa
White text reads best on this color (5.28:1).
About this color
#28729C is a medium-dark, moderately saturated blue. In OKLCH its lightness is 53%, its chroma 0.097 and its hue 238°. Its hue sits on the cool side of the wheel. The nearest named color is Ocean Blue (#03719C), ΔE 0.015 away. White text reads best on it, at 5.28:1.
| Hue family | Blues |
| Lightness | medium-dark (53%) |
| Chroma | moderately saturated (0.097) |
| Temperature | cool |
| Nearest name | Ocean Blue (#03719C) |
| Black text | 3.97:1 |
| White text | 5.28:1 |
Values
| HEX | #28729C |
| RGB | rgb(40, 114, 156) |
| HSL | hsl(202, 59%, 38%) |
| OKLCH | oklch(52.6% 0.097 237.9) |
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 #28729C | 5.28:1 | AA | Lc -81.3 | Fine for body text |
| Black text on #28729C | 3.97:1 | AA large text | Lc 28.1 | Dividers and decoration only |
| #28729C text on white | 5.28:1 | AA | Lc 75.9 | Fine for body text |
| #28729C text on black | 3.97:1 | AA large text | Lc -25.8 | 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 600.
-
Step 50
50
#F2F6F9
oklch(97.1% 0.006 239.8)
-
Step 100
100
#E2EBF1
oklch(93.5% 0.013 236.6)
-
Step 200
200
#CBDCE8
oklch(88.5% 0.025 238.4)
-
Step 300
300
#A7C5DA
oklch(80.8% 0.044 238.6)
-
Step 400
400
#77A7C7
oklch(70.6% 0.07 238.2)
-
Step 500
500
#5191B9
oklch(63% 0.089 237.9)
-
Step 600
600 (this color)
#28729C
oklch(52.6% 0.097 237.9)
-
Step 700
700
#24678E
oklch(49% 0.091 238.4)
-
Step 800
800
#205473
oklch(42.6% 0.075 238.4)
-
Step 900
900
#20465D
oklch(37.7% 0.059 237.6)
-
Step 950
950
#142936
oklch(27% 0.036 237.4)
#28729C 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) | #5E729E | 0.054 |
| Deuteranopia (no green cones) | #4E679B | 0.044 |
| Tritanopia (no blue cones) | #007D80 | 0.065 |
| Achromatopsia (no color) | #6C6C6C | 0.097 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #28729C
#28729C
oklch(52.6% 0.097 237.9)
- #945B2C
#945B2C
oklch(52.6% 0.097 57.8)
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 #28729C, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Ocean Blue #03719C ΔE 0.015
- Muted Blue #3B719F ΔE 0.016
- Sea Blue #047495 ΔE 0.020
- Flat Blue #3C73A8 ΔE 0.026
- Dull Blue #49759C ΔE 0.031
- Nice Blue #107AB0 ΔE 0.034
- Ocean #017B92 ΔE 0.037
- Cerulean #457B9D ΔE 0.039
Use #28729C 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.