#55AC91
Closest named color: Greeny Blue (#42B395). oklch(68.3% 0.094 170.8), rgb(85, 172, 145).
Aa
Black text reads best on this color (7.69:1).
About this color
#55AC91 is a medium-light, moderately saturated teal or cyan. In OKLCH its lightness is 68%, its chroma 0.094 and its hue 171°. Its hue sits on the cool side of the wheel. The nearest named color is Greeny Blue (#42B395), ΔE 0.021 away. Black text reads best on it, at 7.69:1.
| Hue family | Teals and cyans |
| Lightness | medium-light (68%) |
| Chroma | moderately saturated (0.094) |
| Temperature | cool |
| Nearest name | Greeny Blue (#42B395) |
| Black text | 7.69:1 |
| White text | 2.72:1 |
Values
| HEX | #55AC91 |
| RGB | rgb(85, 172, 145) |
| HSL | hsl(161, 34%, 50%) |
| OKLCH | oklch(68.3% 0.094 170.8) |
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 #55AC91 | 2.72:1 | Fails | Lc -57.9 | Large or bold text, headings |
| Black text on #55AC91 | 7.69:1 | AAA | Lc 51.4 | Large or bold text, headings |
| #55AC91 text on white | 2.72:1 | Fails | Lc 52.6 | Large or bold text, headings |
| #55AC91 text on black | 7.69:1 | AAA | Lc -49.2 | 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
#F1F7F5
oklch(97.1% 0.007 174.4)
-
Step 100
100
#DFEEE8
oklch(93.6% 0.018 170.1)
-
Step 200
200
#C5E1D6
oklch(88.6% 0.033 169.9)
-
Step 300
300
#9BCDBB
oklch(80.8% 0.058 170.7)
-
Step 400
400 (this color)
#55AC91
oklch(68.3% 0.094 170.8)
-
Step 500
500
#14A07F
oklch(63% 0.12 170.8)
-
Step 600
600
#00876A
oklch(55.5% 0.109 170.8)
-
Step 700
700
#007259
oklch(49.1% 0.097 170.7)
-
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
#042E23
oklch(27% 0.049 170.9)
#55AC91 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) | #A8A290 | 0.098 |
| Deuteranopia (no green cones) | #9A9993 | 0.092 |
| Tritanopia (no blue cones) | #32ADA4 | 0.032 |
| Achromatopsia (no color) | #9D9D9D | 0.095 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #55AC91
#55AC91
oklch(68.3% 0.094 170.8)
- #C681A0
#C681A0
oklch(68.3% 0.094 351.4)
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 #55AC91, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Greeny Blue #42B395 ΔE 0.021
- Tea #65AB7C ΔE 0.030
- Light Sea Green #20B2AA ΔE 0.039
- Dull Teal #5F9E8F ΔE 0.040
- Dusty Green #76A973 ΔE 0.045
- Dark Seafoam Green #3EAF76 ΔE 0.047
- Grey Teal #5E9B8A ΔE 0.047
- Greeny Grey #7EA07A ΔE 0.050
Use #55AC91 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.