#28738F
Closest named color: Sea Blue (#047495). oklch(52.2% 0.084 226.8), rgb(40, 115, 143).
Aa
White text reads best on this color (5.33:1).
About this color
#28738F is a medium-dark, moderately saturated teal or cyan. In OKLCH its lightness is 52%, its chroma 0.084 and its hue 227°. 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 5.33:1.
| Hue family | Teals and cyans |
| Lightness | medium-dark (52%) |
| Chroma | moderately saturated (0.084) |
| Temperature | cool |
| Nearest name | Sea Blue (#047495) |
| Black text | 3.93:1 |
| White text | 5.33:1 |
Values
| HEX | #28738F |
| RGB | rgb(40, 115, 143) |
| HSL | hsl(196, 56%, 36%) |
| OKLCH | oklch(52.2% 0.084 226.8) |
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 #28738F | 5.33:1 | AA | Lc -81.6 | Fine for body text |
| Black text on #28738F | 3.93:1 | AA large text | Lc 27.8 | Dividers and decoration only |
| #28738F text on white | 5.33:1 | AA | Lc 76.3 | Fine for body text |
| #28738F text on black | 3.93:1 | AA large text | Lc -25.5 | 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
#CADDE5
oklch(88.6% 0.023 224.9)
-
Step 300
300
#A6C7D5
oklch(81% 0.041 225.4)
-
Step 400
400
#74A9C0
oklch(70.6% 0.065 227)
-
Step 500
500
#4D94B1
oklch(63.2% 0.083 227)
-
Step 600
600
#2B7E9C
oklch(55.7% 0.09 226.2)
-
Step 700
700 (this color)
#28738F
oklch(52.2% 0.084 226.8)
-
Step 800
800
#1B566C
oklch(42.6% 0.069 226.9)
-
Step 900
900
#1D4758
oklch(37.6% 0.055 227.5)
-
Step 950
950
#122A33
oklch(27% 0.034 224.8)
#28738F 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) | #647190 | 0.062 |
| Deuteranopia (no green cones) | #56678F | 0.054 |
| Tritanopia (no blue cones) | #007B7C | 0.047 |
| Achromatopsia (no color) | #6B6B6B | 0.084 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #28738F
#28738F
oklch(52.2% 0.084 226.8)
- #915A3E
#915A3E
oklch(52.3% 0.084 47.3)
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 #28738F, 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 #017B92 ΔE 0.025
- Ocean Blue #03719C ΔE 0.027
- Muted Blue #3B719F ΔE 0.033
- Metallic Blue #4F738E ΔE 0.035
- Deep Aqua #08787F ΔE 0.037
- Dull Blue #49759C ΔE 0.038
- Cerulean #457B9D ΔE 0.041
Use #28738F 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.