#3FB191
Closest named color: Greeny Blue (#42B395). oklch(68.7% 0.113 170.9), rgb(63, 177, 145).
Aa
Black text reads best on this color (7.90:1).
About this color
#3FB191 is a medium-light, moderately saturated teal or cyan. In OKLCH its lightness is 69%, its chroma 0.113 and its hue 171°. Its hue sits on the cool side of the wheel. The nearest named color is Greeny Blue (#42B395), ΔE 0.008 away. Black text reads best on it, at 7.90:1.
| Hue family | Teals and cyans |
| Lightness | medium-light (69%) |
| Chroma | moderately saturated (0.113) |
| Temperature | cool |
| Nearest name | Greeny Blue (#42B395) |
| Black text | 7.90:1 |
| White text | 2.65:1 |
Values
| HEX | #3FB191 |
| RGB | rgb(63, 177, 145) |
| HSL | hsl(163, 48%, 47%) |
| OKLCH | oklch(68.7% 0.113 170.9) |
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 #3FB191 | 2.65:1 | Fails | Lc -56.5 | Large or bold text, headings |
| Black text on #3FB191 | 7.90:1 | AAA | Lc 52.7 | Large or bold text, headings |
| #3FB191 text on white | 2.65:1 | Fails | Lc 51.4 | Large or bold text, headings |
| #3FB191 text on black | 7.90:1 | AAA | Lc -50.5 | 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
#F0F8F4
oklch(97.2% 0.01 164.9)
-
Step 100
100
#DDEFE8
oklch(93.7% 0.021 170.6)
-
Step 200
200
#C0E2D6
oklch(88.5% 0.039 172)
-
Step 300
300
#92D0BA
oklch(80.9% 0.071 170.4)
-
Step 400
400 (this color)
#3FB191
oklch(68.7% 0.113 170.9)
-
Step 500
500
#00A17F
oklch(63.1% 0.124 170.8)
-
Step 600
600
#00876B
oklch(55.5% 0.108 171.4)
-
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
#002F23
oklch(27.2% 0.053 170.5)
#3FB191 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) | #ACA68F | 0.116 |
| Deuteranopia (no green cones) | #9C9A93 | 0.111 |
| Tritanopia (no blue cones) | #00B2A8 | 0.035 |
| Achromatopsia (no color) | #9F9F9F | 0.114 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3FB191
#3FB191
oklch(68.7% 0.113 170.9)
- #CF7CA3
#CF7CA3
oklch(68.7% 0.113 350.9)
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 #3FB191, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Greeny Blue #42B395 ΔE 0.008
- Tea #65AB7C ΔE 0.035
- Light Sea Green #20B2AA ΔE 0.036
- Dark Seafoam Green #3EAF76 ΔE 0.037
- Bluey Green #2BB179 ΔE 0.037
- Dark Seafoam #1FB57A ΔE 0.042
- Topaz #13BBAF ΔE 0.043
- Medium Sea Green #3CB371 ΔE 0.047
Use #3FB191 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.