#19B591
Closest named color: Greeny Blue (#42B395). oklch(69% 0.131 171.3), rgb(25, 181, 145).
Aa
Black text reads best on this color (8.05:1).
About this color
#19B591 is a medium-light, moderately saturated teal or cyan. In OKLCH its lightness is 69%, its chroma 0.131 and its hue 171°. Its hue sits on the cool side of the wheel. The nearest named color is Greeny Blue (#42B395), ΔE 0.020 away. Black text reads best on it, at 8.05:1.
| Hue family | Teals and cyans |
| Lightness | medium-light (69%) |
| Chroma | moderately saturated (0.131) |
| Temperature | cool |
| Nearest name | Greeny Blue (#42B395) |
| Black text | 8.05:1 |
| White text | 2.60:1 |
Values
| HEX | #19B591 |
| RGB | rgb(25, 181, 145) |
| HSL | hsl(166, 76%, 40%) |
| OKLCH | oklch(69% 0.131 171.3) |
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 #19B591 | 2.60:1 | Fails | Lc -55.5 | Large or bold text, headings |
| Black text on #19B591 | 8.05:1 | AAA | Lc 53.7 | Large or bold text, headings |
| #19B591 text on white | 2.60:1 | Fails | Lc 50.3 | Large or bold text, headings |
| #19B591 text on black | 8.05:1 | AAA | Lc -51.6 | 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
#EFF8F4
oklch(97.1% 0.011 167.8)
-
Step 100
100
#DBEFE8
oklch(93.5% 0.023 172.8)
-
Step 200
200
#BCE3D5
oklch(88.4% 0.045 171.5)
-
Step 300
300
#89D2BA
oklch(80.9% 0.081 171.5)
-
Step 400
400 (this color)
#19B591
oklch(69% 0.131 171.3)
-
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)
#19B591 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) | #AFA88F | 0.134 |
| Deuteranopia (no green cones) | #9D9B94 | 0.129 |
| Tritanopia (no blue cones) | #00B7AB | 0.036 |
| Achromatopsia (no color) | #A0A0A0 | 0.132 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #19B591
#19B591
oklch(69% 0.131 171.3)
- #D877A5
#D877A5
oklch(69% 0.132 351.3)
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 #19B591, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Greeny Blue #42B395 ΔE 0.020
- Bluey Green #2BB179 ΔE 0.031
- Dark Seafoam #1FB57A ΔE 0.032
- Green Blue #01C08D ΔE 0.035
- Dark Seafoam Green #3EAF76 ΔE 0.035
- Green Teal #0CB577 ΔE 0.037
- Light Sea Green #20B2AA ΔE 0.041
- Medium Sea Green #3CB371 ΔE 0.042
Use #19B591 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.