#28717C
Closest named color: Deep Aqua (#08787F). oklch(50.9% 0.073 209.1), rgb(40, 113, 124).
Aa
White text reads best on this color (5.60:1).
About this color
#28717C is a medium-dark, moderately saturated teal or cyan. In OKLCH its lightness is 51%, its chroma 0.073 and its hue 209°. Its hue sits on the cool side of the wheel. The nearest named color is Deep Aqua (#08787F), ΔE 0.022 away. White text reads best on it, at 5.60:1.
| Hue family | Teals and cyans |
| Lightness | medium-dark (51%) |
| Chroma | moderately saturated (0.073) |
| Temperature | cool |
| Nearest name | Deep Aqua (#08787F) |
| Black text | 3.74:1 |
| White text | 5.60:1 |
Values
| HEX | #28717C |
| RGB | rgb(40, 113, 124) |
| HSL | hsl(188, 51%, 32%) |
| OKLCH | oklch(50.9% 0.073 209.1) |
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 #28717C | 5.60:1 | AA | Lc -83.1 | Fine for body text |
| Black text on #28717C | 3.74:1 | AA large text | Lc 26.3 | Dividers and decoration only |
| #28717C text on white | 5.60:1 | AA | Lc 77.8 | Fine for body text |
| #28717C text on black | 3.74:1 | AA large text | Lc -24.0 | 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
#F2F6F7
oklch(97% 0.004 214.3)
-
Step 100
100
#E3ECED
oklch(93.7% 0.01 204.9)
-
Step 200
200
#CBDDE0
oklch(88.5% 0.02 208.8)
-
Step 300
300
#A7C7CD
oklch(80.8% 0.035 210.2)
-
Step 400
400
#77ABB3
oklch(70.8% 0.056 208)
-
Step 500
500
#5096A1
oklch(63.2% 0.072 208.7)
-
Step 600
600
#30808C
oklch(55.6% 0.078 208.9)
-
Step 700
700 (this color)
#28717C
oklch(50.9% 0.073 209.1)
-
Step 800
800
#1F5861
oklch(42.7% 0.06 209.6)
-
Step 900
900
#20484F
oklch(37.6% 0.046 210.4)
-
Step 950
950
#142A2E
oklch(26.9% 0.029 210.5)
#28717C 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) | #676D7D | 0.069 |
| Deuteranopia (no green cones) | #5B647C | 0.063 |
| Tritanopia (no blue cones) | #007674 | 0.027 |
| Achromatopsia (no color) | #686868 | 0.073 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #28717C
#28717C
oklch(50.9% 0.073 209.1)
- #8A554D
#8A554D
oklch(50.7% 0.072 29.1)
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 #28717C, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Deep Aqua #08787F ΔE 0.022
- Deep Turquoise #017374 ΔE 0.023
- Dark Aquamarine #017371 ΔE 0.027
- Bluegreen #017A79 ΔE 0.032
- Ocean #017B92 ΔE 0.039
- Sea Blue #047495 ΔE 0.039
- Dark Aqua #05696B ΔE 0.039
- Teal #008080 ΔE 0.045
Use #28717C 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.