#5BBDB9
Closest named color: Topaz (#13BBAF). oklch(73.9% 0.092 191.8), rgb(91, 189, 185).
Aa
Black text reads best on this color (9.42:1).
About this color
#5BBDB9 is a medium-light, moderately saturated teal or cyan. In OKLCH its lightness is 74%, its chroma 0.092 and its hue 192°. Its hue sits on the cool side of the wheel. The nearest named color is Topaz (#13BBAF), ΔE 0.040 away. Black text reads best on it, at 9.42:1.
| Hue family | Teals and cyans |
| Lightness | medium-light (74%) |
| Chroma | moderately saturated (0.092) |
| Temperature | cool |
| Nearest name | Topaz (#13BBAF) |
| Black text | 9.42:1 |
| White text | 2.22:1 |
Values
| HEX | #5BBDB9 |
| RGB | rgb(91, 189, 185) |
| HSL | hsl(178, 43%, 55%) |
| OKLCH | oklch(73.9% 0.092 191.8) |
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 #5BBDB9 | 2.22:1 | Fails | Lc -48.5 | Large or bold text, headings |
| Black text on #5BBDB9 | 9.42:1 | AAA | Lc 60.3 | Content text, not long reading |
| #5BBDB9 text on white | 2.22:1 | Fails | Lc 43.7 | Non-text elements, placeholder text |
| #5BBDB9 text on black | 9.42:1 | AAA | Lc -58.5 | Large or bold text, headings |
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 400.
-
Step 50
50
#F0F7F7
oklch(97.1% 0.007 197)
-
Step 100
100
#DEEEED
oklch(93.7% 0.017 192.3)
-
Step 200
200
#C2E0DE
oklch(88.4% 0.032 191.7)
-
Step 300
300
#95CDCA
oklch(80.9% 0.058 191.9)
-
Step 400
400 (this color)
#5BBDB9
oklch(73.9% 0.092 191.8)
-
Step 500
500
#009E9A
oklch(63.2% 0.109 191.6)
-
Step 600
600
#008581
oklch(55.7% 0.096 191.1)
-
Step 700
700
#00706D
oklch(49.2% 0.085 191.5)
-
Step 800
800
#005B59
oklch(42.6% 0.073 192.2)
-
Step 900
900
#004C4A
oklch(37.6% 0.065 191.7)
-
Step 950
950
#002D2C
oklch(26.9% 0.046 192.5)
#5BBDB9 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) | #B3B5B9 | 0.097 |
| Deuteranopia (no green cones) | #A3A9BA | 0.091 |
| Tritanopia (no blue cones) | #11C2BB | 0.033 |
| Achromatopsia (no color) | #AEAEAE | 0.093 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #5BBDB9
#5BBDB9
oklch(73.9% 0.092 191.8)
- #DE929B
#DE929B
oklch(73.9% 0.093 11.8)
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 #5BBDB9, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Topaz #13BBAF ΔE 0.040
- Dark Turquoise #00CED1 ΔE 0.052
- Light Sea Green #20B2AA ΔE 0.052
- Medium Turquoise #48D1CC ΔE 0.054
- Medium Aquamarine #66CDAA ΔE 0.058
- Turquoise Blue #06B1C4 ΔE 0.059
- Pale Teal #82CBB2 ΔE 0.059
- Greeny Blue #42B395 ΔE 0.059
Use #5BBDB9 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.