#33B978
Closest named color: Dark Seafoam (#1FB57A). oklch(69.9% 0.149 157.2), rgb(51, 185, 120).
Aa
Black text reads best on this color (8.35:1).
About this color
#33B978 is a medium-light, vivid green. In OKLCH its lightness is 70%, its chroma 0.149 and its hue 157°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Dark Seafoam (#1FB57A), ΔE 0.016 away. Black text reads best on it, at 8.35:1.
| Hue family | Greens |
| Lightness | medium-light (70%) |
| Chroma | vivid (0.149) |
| Temperature | in between |
| Nearest name | Dark Seafoam (#1FB57A) |
| Black text | 8.35:1 |
| White text | 2.51:1 |
Values
| HEX | #33B978 |
| RGB | rgb(51, 185, 120) |
| HSL | hsl(151, 57%, 46%) |
| OKLCH | oklch(69.9% 0.149 157.2) |
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 #33B978 | 2.51:1 | Fails | Lc -54.0 | Large or bold text, headings |
| Black text on #33B978 | 8.35:1 | AAA | Lc 55.1 | Large or bold text, headings |
| #33B978 text on white | 2.51:1 | Fails | Lc 48.9 | Large or bold text, headings |
| #33B978 text on black | 8.35:1 | AAA | Lc -53.1 | 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
#EFF8F2
oklch(97.1% 0.012 157)
-
Step 100
100
#DCF0E3
oklch(93.7% 0.027 157.4)
-
Step 200
200
#BEE4CC
oklch(88.5% 0.052 157.5)
-
Step 300
300
#8DD3A9
oklch(80.9% 0.093 157.2)
-
Step 400
400 (this color)
#33B978
oklch(69.9% 0.149 157.2)
-
Step 500
500
#00A364
oklch(63% 0.149 157.4)
-
Step 600
600
#008953
oklch(55.5% 0.131 157.3)
-
Step 700
700
#007445
oklch(49.2% 0.117 157)
-
Step 800
800
#005F38
oklch(42.7% 0.101 157.3)
-
Step 900
900
#004F2E
oklch(37.6% 0.089 157.5)
-
Step 950
950
#002F19
oklch(26.9% 0.064 157.1)
#33B978 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) | #B8AA74 | 0.137 |
| Deuteranopia (no green cones) | #A79F7C | 0.132 |
| Tritanopia (no blue cones) | #00B8A8 | 0.068 |
| Achromatopsia (no color) | #A3A3A3 | 0.150 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #33B978
#33B978
oklch(69.9% 0.149 157.2)
- #D777BF
#D777BF
oklch(69.9% 0.148 337.2)
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 #33B978, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Seafoam #1FB57A ΔE 0.016
- Medium Sea Green #3CB371 ΔE 0.017
- Green Teal #0CB577 ΔE 0.018
- Dark Mint Green #20C073 ΔE 0.024
- Cool Green #33B864 ΔE 0.025
- Bluey Green #2BB179 ΔE 0.025
- Dark Mint #48C072 ΔE 0.027
- Green Blue #01C08D ΔE 0.028
Use #33B978 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.