#C5E578
Closest named color: Light Grey Green (#B7E1A1). oklch(87.5% 0.141 122.8), rgb(197, 229, 120).
Aa
Black text reads best on this color (14.85:1).
About this color
#C5E578 is a light, vivid yellow. In OKLCH its lightness is 88%, its chroma 0.141 and its hue 123°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Light Grey Green (#B7E1A1), ΔE 0.052 away. Black text reads best on it, at 14.85:1.
| Hue family | Yellows |
| Lightness | light (88%) |
| Chroma | vivid (0.141) |
| Temperature | in between |
| Nearest name | Light Grey Green (#B7E1A1) |
| Black text | 14.85:1 |
| White text | 1.41:1 |
Values
| HEX | #C5E578 |
| RGB | rgb(197, 229, 120) |
| HSL | hsl(78, 68%, 68%) |
| OKLCH | oklch(87.5% 0.141 122.8) |
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 #C5E578 | 1.41:1 | Fails | Lc -22.7 | Dividers and decoration only |
| Black text on #C5E578 | 14.85:1 | AAA | Lc 83.8 | Fine for body text |
| #C5E578 text on white | 1.41:1 | Fails | Lc 19.9 | Dividers and decoration only |
| #C5E578 text on black | 14.85:1 | AAA | Lc -83.5 | Fine for body text |
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 200.
-
Step 50
50
#F2F8E7
oklch(97% 0.023 122.7)
-
Step 100
100
#E3F0CA
oklch(93.6% 0.052 122.8)
-
Step 200
200 (this color)
#C5E578
oklch(87.5% 0.141 122.8)
-
Step 300
300
#ACD234
oklch(80.9% 0.18 122.6)
-
Step 400
400
#8DB100
oklch(70.8% 0.174 123)
-
Step 500
500
#799700
oklch(63% 0.154 122.6)
-
Step 600
600
#657F00
oklch(55.6% 0.136 122.8)
-
Step 700
700
#546B00
oklch(49.1% 0.121 123.1)
-
Step 800
800
#455700
oklch(42.6% 0.104 122.4)
-
Step 900
900
#394900
oklch(37.8% 0.092 122.7)
-
Step 950
950
#212B00
oklch(27% 0.066 122.2)
#C5E578 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) | #F0DA6F | 0.060 |
| Deuteranopia (no green cones) | #ECD97E | 0.061 |
| Tritanopia (no blue cones) | #CDDCCC | 0.116 |
| Achromatopsia (no color) | #D9D9D9 | 0.141 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #C5E578
#C5E578
oklch(87.5% 0.141 122.8)
- #DFCBFF
#DFCBFF
oklch(87.5% 0.074 302.4)
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 #C5E578, closest first.
No curated palette has a color within ΔE 0.04 of #C5E578.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Light Grey Green #B7E1A1 ΔE 0.052
- Pistachio #C0FA8B ΔE 0.052
- Washed Out Green #BCF5A6 ΔE 0.053
- Greenish Beige #C9D179 ΔE 0.054
- Light Sage #BCECAC ΔE 0.055
- Dull Yellow #EEDC5B ΔE 0.055
- Light Green #90EE90 ΔE 0.057
- Pale Light Green #B1FC99 ΔE 0.059
Use #C5E578 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.