#5BCDB9
Closest named color: Medium Aquamarine (#66CDAA). oklch(77.7% 0.108 180.1), rgb(91, 205, 185).
Aa
Black text reads best on this color (10.87:1).
About this color
#5BCDB9 is a medium-light, moderately saturated teal or cyan. In OKLCH its lightness is 78%, its chroma 0.108 and its hue 180°. Its hue sits on the cool side of the wheel. The nearest named color is Medium Aquamarine (#66CDAA), ΔE 0.021 away. Black text reads best on it, at 10.87:1.
| Hue family | Teals and cyans |
| Lightness | medium-light (78%) |
| Chroma | moderately saturated (0.108) |
| Temperature | cool |
| Nearest name | Medium Aquamarine (#66CDAA) |
| Black text | 10.87:1 |
| White text | 1.93:1 |
Values
| HEX | #5BCDB9 |
| RGB | rgb(91, 205, 185) |
| HSL | hsl(169, 53%, 58%) |
| OKLCH | oklch(77.7% 0.108 180.1) |
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 #5BCDB9 | 1.93:1 | Fails | Lc -41.0 | Non-text elements, placeholder text |
| Black text on #5BCDB9 | 10.87:1 | AAA | Lc 67.2 | Content text, not long reading |
| #5BCDB9 text on white | 1.93:1 | Fails | Lc 36.7 | Non-text elements, placeholder text |
| #5BCDB9 text on black | 10.87:1 | AAA | Lc -65.7 | 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
#ECF9F6
oklch(97.2% 0.014 180.7)
-
Step 100
100
#D5F1EB
oklch(93.6% 0.03 181.3)
-
Step 200
200
#AEE7DB
oklch(88.6% 0.06 180.4)
-
Step 300
300 (this color)
#5BCDB9
oklch(77.7% 0.108 180.1)
-
Step 400
400
#00BAA4
oklch(70.7% 0.128 180.3)
-
Step 500
500
#00A08C
oklch(63.2% 0.115 179.7)
-
Step 600
600
#008676
oklch(55.6% 0.1 180.5)
-
Step 700
700
#007163
oklch(49.2% 0.089 180.3)
-
Step 800
800
#005C51
oklch(42.6% 0.077 181.1)
-
Step 900
900
#004D43
oklch(37.7% 0.068 180.3)
-
Step 950
950
#002E27
oklch(27% 0.049 179.5)
#5BCDB9 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) | #C5C2B8 | 0.114 |
| Deuteranopia (no green cones) | #B3B5BB | 0.109 |
| Tritanopia (no blue cones) | #00D0C7 | 0.032 |
| Achromatopsia (no color) | #BABABA | 0.109 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #5BCDB9
#5BCDB9
oklch(77.7% 0.108 180.1)
- #EF99B3
#EF99B3
oklch(77.7% 0.107 0.3)
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 #5BCDB9, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Medium Aquamarine #66CDAA ΔE 0.021
- Medium Turquoise #48D1CC ΔE 0.026
- Seafoam Blue #78D1B6 ΔE 0.028
- Pale Teal #82CBB2 ΔE 0.032
- Dark Turquoise #00CED1 ΔE 0.042
- Turquoise #40E0D0 ΔE 0.052
- Tiffany Blue #94D2BD ΔE 0.056
- Emerald #06D6A0 ΔE 0.060
Use #5BCDB9 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.