#1BB5AF
Closest named color: Light Sea Green (#20B2AA). oklch(70% 0.117 190.5), rgb(27, 181, 175).
Aa
Black text reads best on this color (8.27:1).
About this color
#1BB5AF is a medium-light, moderately saturated teal or cyan. In OKLCH its lightness is 70%, its chroma 0.117 and its hue 191°. Its hue sits on the cool side of the wheel. The nearest named color is Light Sea Green (#20B2AA), ΔE 0.009 away. Black text reads best on it, at 8.27:1.
| Hue family | Teals and cyans |
| Lightness | medium-light (70%) |
| Chroma | moderately saturated (0.117) |
| Temperature | cool |
| Nearest name | Light Sea Green (#20B2AA) |
| Black text | 8.27:1 |
| White text | 2.53:1 |
Values
| HEX | #1BB5AF |
| RGB | rgb(27, 181, 175) |
| HSL | hsl(178, 74%, 41%) |
| OKLCH | oklch(70% 0.117 190.5) |
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 #1BB5AF | 2.53:1 | Fails | Lc -54.3 | Large or bold text, headings |
| Black text on #1BB5AF | 8.27:1 | AAA | Lc 54.8 | Large or bold text, headings |
| #1BB5AF text on white | 2.53:1 | Fails | Lc 49.2 | Large or bold text, headings |
| #1BB5AF text on black | 8.27:1 | AAA | Lc -52.7 | 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
#EFF8F7
oklch(97.2% 0.01 189.1)
-
Step 100
100
#DBEFED
oklch(93.7% 0.021 189.6)
-
Step 200
200
#BCE2DF
oklch(88.5% 0.04 190.6)
-
Step 300
300
#88D0CB
oklch(80.9% 0.072 190.3)
-
Step 400
400 (this color)
#1BB5AF
oklch(70% 0.117 190.5)
-
Step 500
500
#009E99
oklch(63.1% 0.109 190.8)
-
Step 600
600
#008580
oklch(55.7% 0.096 190.1)
-
Step 700
700
#00706C
oklch(49.2% 0.085 190.4)
-
Step 800
800
#005C58
oklch(42.8% 0.074 189.6)
-
Step 900
900
#004C49
oklch(37.6% 0.065 190.2)
-
Step 950
950
#002D2C
oklch(26.9% 0.046 192.5)
#1BB5AF 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) | #AAABAF | 0.123 |
| Deuteranopia (no green cones) | #969CB0 | 0.116 |
| Tritanopia (no blue cones) | #00BAB3 | 0.014 |
| Achromatopsia (no color) | #A2A2A2 | 0.117 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #1BB5AF
#1BB5AF
oklch(70% 0.117 190.5)
- #DC7E8D
#DC7E8D
oklch(69.9% 0.117 10.3)
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 #1BB5AF, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Light Sea Green #20B2AA ΔE 0.009
- Topaz #13BBAF ΔE 0.018
- Turquoise Blue #06B1C4 ΔE 0.037
- Greeny Blue #42B395 ΔE 0.037
- Green Blue #01C08D ΔE 0.067
- Cadet Blue #5F9EA0 ΔE 0.068
- Dull Teal #5F9E8F ΔE 0.070
- Persian Green #2A9D8F ΔE 0.072
Use #1BB5AF 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.