#1BB579
Closest named color: Dark Seafoam (#1FB57A). oklch(68.5% 0.149 160), rgb(27, 181, 121).
Aa
Black text reads best on this color (7.93:1).
About this color
#1BB579 is a medium-light, vivid green. In OKLCH its lightness is 68%, its chroma 0.149 and its hue 160°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Dark Seafoam (#1FB57A), ΔE 0.002 away. Black text reads best on it, at 7.93:1.
| Hue family | Greens |
| Lightness | medium-light (68%) |
| Chroma | vivid (0.149) |
| Temperature | in between |
| Nearest name | Dark Seafoam (#1FB57A) |
| Black text | 7.93:1 |
| White text | 2.64:1 |
Values
| HEX | #1BB579 |
| RGB | rgb(27, 181, 121) |
| HSL | hsl(157, 74%, 41%) |
| OKLCH | oklch(68.5% 0.149 160) |
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 #1BB579 | 2.64:1 | Fails | Lc -56.2 | Large or bold text, headings |
| Black text on #1BB579 | 7.93:1 | AAA | Lc 53.0 | Large or bold text, headings |
| #1BB579 text on white | 2.64:1 | Fails | Lc 51.0 | Large or bold text, headings |
| #1BB579 text on black | 7.93:1 | AAA | Lc -50.9 | 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
#EFF8F3
oklch(97.1% 0.012 162.1)
-
Step 100
100
#DBF0E4
oklch(93.6% 0.027 160.9)
-
Step 200
200
#BDE4CE
oklch(88.5% 0.051 160.5)
-
Step 300
300
#8AD4AC
oklch(81% 0.094 159.7)
-
Step 400
400 (this color)
#1BB579
oklch(68.5% 0.149 160)
-
Step 500
500
#00A36B
oklch(63.1% 0.143 160.1)
-
Step 600
600
#008959
oklch(55.6% 0.126 160)
-
Step 700
700
#00734A
oklch(49% 0.111 160)
-
Step 800
800
#005F3C
oklch(42.8% 0.097 159.8)
-
Step 900
900
#004F31
oklch(37.7% 0.086 159.7)
-
Step 950
950
#002F1C
oklch(26.9% 0.06 160.5)
#1BB579 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) | #B3A675 | 0.141 |
| Deuteranopia (no green cones) | #A19A7D | 0.136 |
| Tritanopia (no blue cones) | #00B4A5 | 0.064 |
| Achromatopsia (no color) | #9F9F9F | 0.150 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #1BB579
#1BB579
oklch(68.5% 0.149 160)
- #D572B6
#D572B6
oklch(68.5% 0.148 340.3)
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 #1BB579, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Seafoam #1FB57A ΔE 0.002
- Green Teal #0CB577 ΔE 0.004
- Bluey Green #2BB179 ΔE 0.012
- Medium Sea Green #3CB371 ΔE 0.014
- Dark Seafoam Green #3EAF76 ΔE 0.020
- Jade Green #2BAF6A ΔE 0.021
- Seaweed Green #35AD6B ΔE 0.024
- Cool Green #33B864 ΔE 0.031
Use #1BB579 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.