#647F00
Closest named color: Olive Green (#677A04). oklch(55.5% 0.136 123.2), rgb(100, 127, 0).
Aa
White text reads best on this color (4.58:1).
About this color
#647F00 is a medium-dark, moderately saturated yellow. In OKLCH its lightness is 55%, its chroma 0.136 and its hue 123°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Olive Green (#677A04), ΔE 0.015 away. White text reads best on it, at 4.58:1.
| Hue family | Yellows |
| Lightness | medium-dark (55%) |
| Chroma | moderately saturated (0.136) |
| Temperature | in between |
| Nearest name | Olive Green (#677A04) |
| Black text | 4.57:1 |
| White text | 4.58:1 |
Values
| HEX | #647F00 |
| RGB | rgb(100, 127, 0) |
| HSL | hsl(73, 100%, 25%) |
| OKLCH | oklch(55.5% 0.136 123.2) |
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 #647F00 | 4.58:1 | AA | Lc -77.1 | Fine for body text |
| Black text on #647F00 | 4.57:1 | AA | Lc 32.4 | Non-text elements, placeholder text |
| #647F00 text on white | 4.58:1 | AA | Lc 71.7 | Content text, not long reading |
| #647F00 text on black | 4.57:1 | AA | Lc -30.0 | Non-text elements, placeholder 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 600.
-
Step 50
50
#F4F6F0
oklch(97% 0.008 121.6)
-
Step 100
100
#E7ECDF
oklch(93.6% 0.018 124)
-
Step 200
200
#D4DDC5
oklch(88.4% 0.034 123.9)
-
Step 300
300
#B9C89C
oklch(81% 0.062 123.1)
-
Step 400
400
#95AB65
oklch(70.8% 0.098 123.1)
-
Step 500
500
#7B9536
oklch(63% 0.125 123)
-
Step 600
600 (this color)
#647F00
oklch(55.5% 0.136 123.2)
-
Step 700
700
#546B00
oklch(49.1% 0.121 123.1)
-
Step 800
800
#445800
oklch(42.8% 0.106 123.5)
-
Step 900
900
#39480F
oklch(37.6% 0.082 123.3)
-
Step 950
950
#222A0B
oklch(26.9% 0.051 122.1)
#647F00 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) | #877600 | 0.057 |
| Deuteranopia (no green cones) | #847515 | 0.057 |
| Tritanopia (no blue cones) | #6A786B | 0.113 |
| Achromatopsia (no color) | #757575 | 0.137 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #647F00
#647F00
oklch(55.5% 0.136 123.2)
- #845CB4
#845CB4
oklch(55.5% 0.137 303.2)
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 #647F00, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Olive Green #677A04 ΔE 0.015
- Murky Green #6C7A0E ΔE 0.020
- Swamp Green #748500 ΔE 0.030
- Sap Green #5C8B15 ΔE 0.034
- Mossy Green #638B27 ΔE 0.035
- Swamp #698339 ΔE 0.036
- Olive #808000 ΔE 0.041
- Moss Green #658B38 ΔE 0.041
Use #647F00 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.