#1BB5B3
Closest named color: Light Sea Green (#20B2AA). oklch(70.1% 0.116 193.4), rgb(27, 181, 179).
Aa
Black text reads best on this color (8.30:1).
About this color
#1BB5B3 is a medium-light, moderately saturated teal or cyan. In OKLCH its lightness is 70%, its chroma 0.116 and its hue 193°. Its hue sits on the cool side of the wheel. The nearest named color is Light Sea Green (#20B2AA), ΔE 0.014 away. Black text reads best on it, at 8.30:1.
| Hue family | Teals and cyans |
| Lightness | medium-light (70%) |
| Chroma | moderately saturated (0.116) |
| Temperature | cool |
| Nearest name | Light Sea Green (#20B2AA) |
| Black text | 8.30:1 |
| White text | 2.52:1 |
Values
| HEX | #1BB5B3 |
| RGB | rgb(27, 181, 179) |
| HSL | hsl(179, 74%, 41%) |
| OKLCH | oklch(70.1% 0.116 193.4) |
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 #1BB5B3 | 2.52:1 | Fails | Lc -54.1 | Large or bold text, headings |
| Black text on #1BB5B3 | 8.30:1 | AAA | Lc 55.0 | Large or bold text, headings |
| #1BB5B3 text on white | 2.52:1 | Fails | Lc 49.0 | Large or bold text, headings |
| #1BB5B3 text on black | 8.30:1 | AAA | Lc -52.9 | 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
#EEF8F7
oklch(97.1% 0.011 189.8)
-
Step 100
100
#DBEFEE
oklch(93.7% 0.021 193.2)
-
Step 200
200
#BCE2E0
oklch(88.5% 0.04 192.5)
-
Step 300
300
#87D0CE
oklch(80.9% 0.073 193.6)
-
Step 400
400 (this color)
#1BB5B3
oklch(70.1% 0.116 193.4)
-
Step 500
500
#009D9C
oklch(63% 0.108 194)
-
Step 600
600
#008483
oklch(55.5% 0.095 193.8)
-
Step 700
700
#006F6E
oklch(49% 0.084 193.7)
-
Step 800
800
#005B5A
oklch(42.6% 0.073 193.5)
-
Step 900
900
#004C4B
oklch(37.7% 0.064 193.2)
-
Step 950
950
#002D2D
oklch(26.9% 0.046 194.8)
#1BB5B3 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) | #A9ABB3 | 0.122 |
| Deuteranopia (no green cones) | #959DB4 | 0.113 |
| Tritanopia (no blue cones) | #00BBB4 | 0.017 |
| Achromatopsia (no color) | #A3A3A3 | 0.117 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #1BB5B3
#1BB5B3
oklch(70.1% 0.116 193.4)
- #DD7F8A
#DD7F8A
oklch(70.1% 0.116 13)
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 #1BB5B3, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Light Sea Green #20B2AA ΔE 0.014
- Topaz #13BBAF ΔE 0.020
- Turquoise Blue #06B1C4 ΔE 0.031
- Greeny Blue #42B395 ΔE 0.043
- Cadet Blue #5F9EA0 ΔE 0.067
- Dull Teal #5F9E8F ΔE 0.072
- Dark Turquoise #00CED1 ΔE 0.073
- Green Blue #01C08D ΔE 0.073
Use #1BB5B3 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.