#28CDDB
Closest named color: Dark Turquoise (#00CED1). oklch(77.6% 0.126 204), rgb(40, 205, 219).
Aa
Black text reads best on this color (10.84:1).
About this color
#28CDDB is a medium-light, moderately saturated teal or cyan. In OKLCH its lightness is 78%, its chroma 0.126 and its hue 204°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Turquoise (#00CED1), ΔE 0.018 away. Black text reads best on it, at 10.84:1.
| Hue family | Teals and cyans |
| Lightness | medium-light (78%) |
| Chroma | moderately saturated (0.126) |
| Temperature | cool |
| Nearest name | Dark Turquoise (#00CED1) |
| Black text | 10.84:1 |
| White text | 1.93:1 |
Values
| HEX | #28CDDB |
| RGB | rgb(40, 205, 219) |
| HSL | hsl(185, 71%, 51%) |
| OKLCH | oklch(77.6% 0.126 204) |
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 #28CDDB | 1.93:1 | Fails | Lc -40.9 | Non-text elements, placeholder text |
| Black text on #28CDDB | 10.84:1 | AAA | Lc 67.3 | Content text, not long reading |
| #28CDDB text on white | 1.93:1 | Fails | Lc 36.6 | Non-text elements, placeholder text |
| #28CDDB text on black | 10.84:1 | AAA | Lc -65.8 | Content text, not long reading |
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 300.
-
Step 50
50
#E9F9FB
oklch(97.1% 0.017 205.8)
-
Step 100
100
#CFF2F5
oklch(93.7% 0.037 202.9)
-
Step 200
200
#A2E7EE
oklch(88.5% 0.069 203.9)
-
Step 300
300 (this color)
#28CDDB
oklch(77.6% 0.126 204)
-
Step 400
400
#00B6C3
oklch(70.8% 0.121 203.9)
-
Step 500
500
#009CA7
oklch(63.1% 0.108 203.6)
-
Step 600
600
#00838D
oklch(55.6% 0.095 204.2)
-
Step 700
700
#006E76
oklch(49.1% 0.084 203.6)
-
Step 800
800
#005A61
oklch(42.6% 0.073 204)
-
Step 900
900
#004B51
oklch(37.6% 0.064 204)
-
Step 950
950
#002D31
oklch(27.1% 0.046 204.1)
#28CDDB 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) | #BCC4DC | 0.125 |
| Deuteranopia (no green cones) | #A4B3DC | 0.115 |
| Tritanopia (no blue cones) | #00D6D1 | 0.033 |
| Achromatopsia (no color) | #BABABA | 0.127 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #28CDDB
#28CDDB
oklch(77.6% 0.126 204)
- #FC958F
#FC958F
oklch(77.6% 0.125 23.9)
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 #28CDDB, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Turquoise #00CED1 ΔE 0.018
- Medium Turquoise #48D1CC ΔE 0.030
- Aqua Blue #02D8E9 ΔE 0.031
- Vivid Sky Blue #4CC9F0 ΔE 0.040
- Bright Sky Blue #02CCFE ΔE 0.052
- Turquoise #40E0D0 ΔE 0.063
- Sky Blue #87CEEB ΔE 0.070
- Seafoam Blue #78D1B6 ΔE 0.071
Use #28CDDB 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.