#28728F
Closest named color: Sea Blue (#047495). oklch(52% 0.085 228), rgb(40, 114, 143).
Aa
White text reads best on this color (5.39:1).
About this color
#28728F is a medium-dark, moderately saturated teal or cyan. In OKLCH its lightness is 52%, its chroma 0.085 and its hue 228°. Its hue sits on the cool side of the wheel. The nearest named color is Sea Blue (#047495), ΔE 0.015 away. White text reads best on it, at 5.39:1.
| Hue family | Teals and cyans |
| Lightness | medium-dark (52%) |
| Chroma | moderately saturated (0.085) |
| Temperature | cool |
| Nearest name | Sea Blue (#047495) |
| Black text | 3.89:1 |
| White text | 5.39:1 |
Values
| HEX | #28728F |
| RGB | rgb(40, 114, 143) |
| HSL | hsl(197, 56%, 36%) |
| OKLCH | oklch(52% 0.085 228) |
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 #28728F | 5.39:1 | AA | Lc -81.9 | Fine for body text |
| Black text on #28728F | 3.89:1 | AA large text | Lc 27.5 | Dividers and decoration only |
| #28728F text on white | 5.39:1 | AA | Lc 76.6 | Fine for body text |
| #28728F text on black | 3.89:1 | AA large text | Lc -25.1 | 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
#F2F6F8
oklch(97.1% 0.005 228.8)
-
Step 100
100
#E2ECF0
oklch(93.7% 0.012 223.5)
-
Step 200
200
#CADCE5
oklch(88.4% 0.023 229.1)
-
Step 300
300
#A6C6D6
oklch(80.8% 0.041 229.5)
-
Step 400
400
#75A9C1
oklch(70.7% 0.065 228.5)
-
Step 500
500
#4D93B1
oklch(63% 0.084 228.2)
-
Step 600
600
#2C7D9D
oklch(55.5% 0.091 228.3)
-
Step 700
700 (this color)
#28728F
oklch(52% 0.085 228)
-
Step 800
800
#1C566D
oklch(42.7% 0.07 228.3)
-
Step 900
900
#1E4758
oklch(37.6% 0.054 228)
-
Step 950
950
#132A34
oklch(27.1% 0.034 228.3)
#28728F 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) | #637090 | 0.062 |
| Deuteranopia (no green cones) | #55668F | 0.053 |
| Tritanopia (no blue cones) | #007A7C | 0.047 |
| Achromatopsia (no color) | #6A6A6A | 0.085 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #28728F
#28728F
oklch(52% 0.085 228)
- #90593C
#90593C
oklch(51.9% 0.084 48)
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 #28728F, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Sea Blue #047495 ΔE 0.015
- Ocean Blue #03719C ΔE 0.025
- Ocean #017B92 ΔE 0.027
- Muted Blue #3B719F ΔE 0.032
- Metallic Blue #4F738E ΔE 0.036
- Dull Blue #49759C ΔE 0.038
- Deep Aqua #08787F ΔE 0.039
- Peacock Blue #016795 ΔE 0.043
Use #28728F 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.