#5BBFA1
Closest named color: Medium Aquamarine (#66CDAA). oklch(73.6% 0.105 171.2), rgb(91, 191, 161).
Aa
Black text reads best on this color (9.41:1).
About this color
#5BBFA1 is a medium-light, moderately saturated teal or cyan. In OKLCH its lightness is 74%, its chroma 0.105 and its hue 171°. Its hue sits on the cool side of the wheel. The nearest named color is Medium Aquamarine (#66CDAA), ΔE 0.041 away. Black text reads best on it, at 9.41:1.
| Hue family | Teals and cyans |
| Lightness | medium-light (74%) |
| Chroma | moderately saturated (0.105) |
| Temperature | cool |
| Nearest name | Medium Aquamarine (#66CDAA) |
| Black text | 9.41:1 |
| White text | 2.23:1 |
Values
| HEX | #5BBFA1 |
| RGB | rgb(91, 191, 161) |
| HSL | hsl(162, 44%, 55%) |
| OKLCH | oklch(73.6% 0.105 171.2) |
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 #5BBFA1 | 2.23:1 | Fails | Lc -48.5 | Large or bold text, headings |
| Black text on #5BBFA1 | 9.41:1 | AAA | Lc 60.2 | Content text, not long reading |
| #5BBFA1 text on white | 2.23:1 | Fails | Lc 43.7 | Non-text elements, placeholder text |
| #5BBFA1 text on black | 9.41:1 | AAA | Lc -58.4 | 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
#F0F7F5
oklch(97% 0.008 177.3)
-
Step 100
100
#DEEEE8
oklch(93.6% 0.019 171.5)
-
Step 200
200
#C2E1D6
oklch(88.4% 0.036 172)
-
Step 300
300
#96CFBB
oklch(81% 0.065 170.9)
-
Step 400
400 (this color)
#5BBFA1
oklch(73.6% 0.105 171.2)
-
Step 500
500
#00A180
oklch(63.1% 0.123 171.4)
-
Step 600
600
#00876B
oklch(55.5% 0.108 171.4)
-
Step 700
700
#00725A
oklch(49.2% 0.096 171.5)
-
Step 800
800
#005D49
oklch(42.6% 0.083 171.6)
-
Step 900
900
#004E3C
oklch(37.7% 0.074 170.6)
-
Step 950
950
#002F23
oklch(27.2% 0.053 170.5)
#5BBFA1 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) | #BAB4A0 | 0.108 |
| Deuteranopia (no green cones) | #ABA9A3 | 0.103 |
| Tritanopia (no blue cones) | #2EC0B6 | 0.035 |
| Achromatopsia (no color) | #AEAEAE | 0.106 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #5BBFA1
#5BBFA1
oklch(73.6% 0.105 171.2)
- #DC8EB1
#DC8EB1
oklch(73.6% 0.104 351.5)
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 #5BBFA1, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Medium Aquamarine #66CDAA ΔE 0.041
- Topaz #13BBAF ΔE 0.042
- Greeny Blue #42B395 ΔE 0.042
- Green Blue #01C08D ΔE 0.050
- Greenblue #23C48B ΔE 0.050
- Dark Sea Green #8FBC8F ΔE 0.051
- Muted Teal #90B494 ΔE 0.055
- Pale Teal #82CBB2 ΔE 0.056
Use #5BBFA1 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.