#51C19B
Closest named color: Greenblue (#23C48B). oklch(73.6% 0.117 167.8), rgb(81, 193, 155).
Aa
Black text reads best on this color (9.45:1).
About this color
#51C19B is a medium-light, moderately saturated green. In OKLCH its lightness is 74%, its chroma 0.117 and its hue 168°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Greenblue (#23C48B), ΔE 0.036 away. Black text reads best on it, at 9.45:1.
| Hue family | Greens |
| Lightness | medium-light (74%) |
| Chroma | moderately saturated (0.117) |
| Temperature | in between |
| Nearest name | Greenblue (#23C48B) |
| Black text | 9.45:1 |
| White text | 2.22:1 |
Values
| HEX | #51C19B |
| RGB | rgb(81, 193, 155) |
| HSL | hsl(160, 47%, 54%) |
| OKLCH | oklch(73.6% 0.117 167.8) |
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 #51C19B | 2.22:1 | Fails | Lc -48.3 | Large or bold text, headings |
| Black text on #51C19B | 9.45:1 | AAA | Lc 60.5 | Content text, not long reading |
| #51C19B text on white | 2.22:1 | Fails | Lc 43.5 | Non-text elements, placeholder text |
| #51C19B text on black | 9.45:1 | AAA | Lc -58.7 | 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
#DDEFE7
oklch(93.7% 0.022 167.5)
-
Step 200
200
#C0E2D4
oklch(88.4% 0.041 168.6)
-
Step 300
300
#92D0B7
oklch(80.8% 0.073 167.5)
-
Step 400
400 (this color)
#51C19B
oklch(73.6% 0.117 167.8)
-
Step 500
500
#00A27A
oklch(63.2% 0.129 167.5)
-
Step 600
600
#008866
oklch(55.6% 0.113 167.6)
-
Step 700
700
#007255
oklch(49% 0.1 167.6)
-
Step 800
800
#005E46
oklch(42.8% 0.087 168)
-
Step 900
900
#004E39
oklch(37.6% 0.077 167.4)
-
Step 950
950
#002F21
oklch(27.1% 0.055 167.3)
#51C19B 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) | #BDB599 | 0.119 |
| Deuteranopia (no green cones) | #ACA99D | 0.113 |
| Tritanopia (no blue cones) | #0CC2B6 | 0.042 |
| Achromatopsia (no color) | #AEAEAE | 0.118 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #51C19B
#51C19B
oklch(73.6% 0.117 167.8)
- #E08AB7
#E08AB7
oklch(73.6% 0.118 347.7)
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 #51C19B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Greenblue #23C48B ΔE 0.036
- Green Blue #01C08D ΔE 0.038
- Medium Aquamarine #66CDAA ΔE 0.042
- Greeny Blue #42B395 ΔE 0.043
- Topaz #13BBAF ΔE 0.045
- Soft Green #6FC276 ΔE 0.051
- Dark Mint #48C072 ΔE 0.056
- Dark Sea Green #8FBC8F ΔE 0.056
Use #51C19B 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.