#1BC59E
Closest named color: Greenblue (#23C48B). oklch(73.5% 0.139 171.3), rgb(27, 197, 158).
Aa
Black text reads best on this color (9.52:1).
About this color
#1BC59E is a medium-light, moderately saturated teal or cyan. In OKLCH its lightness is 74%, its chroma 0.139 and its hue 171°. Its hue sits on the cool side of the wheel. The nearest named color is Greenblue (#23C48B), ΔE 0.025 away. Black text reads best on it, at 9.52:1.
| Hue family | Teals and cyans |
| Lightness | medium-light (74%) |
| Chroma | moderately saturated (0.139) |
| Temperature | cool |
| Nearest name | Greenblue (#23C48B) |
| Black text | 9.52:1 |
| White text | 2.20:1 |
Values
| HEX | #1BC59E |
| RGB | rgb(27, 197, 158) |
| HSL | hsl(166, 76%, 44%) |
| OKLCH | oklch(73.5% 0.139 171.3) |
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 #1BC59E | 2.20:1 | Fails | Lc -47.6 | Large or bold text, headings |
| Black text on #1BC59E | 9.52:1 | AAA | Lc 61.1 | Content text, not long reading |
| #1BC59E text on white | 2.20:1 | Fails | Lc 42.8 | Non-text elements, placeholder text |
| #1BC59E text on black | 9.52:1 | AAA | Lc -59.4 | 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
#EEF8F4
oklch(97.1% 0.012 170.3)
-
Step 100
100
#DAF0E8
oklch(93.7% 0.025 171.9)
-
Step 200
200
#BAE4D5
oklch(88.5% 0.048 171.4)
-
Step 300
300
#84D3B9
oklch(80.8% 0.087 171.1)
-
Step 400
400 (this color)
#1BC59E
oklch(73.5% 0.139 171.3)
-
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)
#1BC59E 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) | #BFB79C | 0.143 |
| Deuteranopia (no green cones) | #ABA9A1 | 0.137 |
| Tritanopia (no blue cones) | #00C7BA | 0.039 |
| Achromatopsia (no color) | #AFAFAF | 0.141 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #1BC59E
#1BC59E
oklch(73.5% 0.139 171.3)
- #EA82B4
#EA82B4
oklch(73.4% 0.139 350.9)
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 #1BC59E, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Greenblue #23C48B ΔE 0.025
- Green Blue #01C08D ΔE 0.026
- Topaz #13BBAF ΔE 0.044
- Emerald #06D6A0 ΔE 0.048
- Greeny Blue #42B395 ΔE 0.049
- Medium Aquamarine #66CDAA ΔE 0.051
- Dark Mint #48C072 ΔE 0.054
- Dark Mint Green #20C073 ΔE 0.055
Use #1BC59E 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.