#647B19
Closest named color: Olive Green (#677A04). oklch(54.6% 0.122 122.4), rgb(100, 123, 25).
Aa
White text reads best on this color (4.78:1).
About this color
#647B19 is a medium-dark, moderately saturated yellow. In OKLCH its lightness is 55%, its chroma 0.122 and its hue 122°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Olive Green (#677A04), ΔE 0.008 away. White text reads best on it, at 4.78:1.
| Hue family | Yellows |
| Lightness | medium-dark (55%) |
| Chroma | moderately saturated (0.122) |
| Temperature | in between |
| Nearest name | Olive Green (#677A04) |
| Black text | 4.38:1 |
| White text | 4.78:1 |
Values
| HEX | #647B19 |
| RGB | rgb(100, 123, 25) |
| HSL | hsl(74, 66%, 29%) |
| OKLCH | oklch(54.6% 0.122 122.4) |
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 #647B19 | 4.78:1 | AA | Lc -78.5 | Fine for body text |
| Black text on #647B19 | 4.38:1 | AA large text | Lc 31.0 | Non-text elements, placeholder text |
| #647B19 text on white | 4.78:1 | AA | Lc 73.1 | Content text, not long reading |
| #647B19 text on black | 4.38:1 | AA large text | Lc -28.6 | Dividers and decoration only |
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
#F4F6F1
oklch(97% 0.007 124.4)
-
Step 100
100
#E8ECE0
oklch(93.7% 0.017 121.8)
-
Step 200
200
#D5DDC7
oklch(88.5% 0.031 123.3)
-
Step 300
300
#BAC7A0
oklch(80.9% 0.055 122.6)
-
Step 400
400
#97AA6B
oklch(70.8% 0.088 122.3)
-
Step 500
500
#7D9441
oklch(63% 0.113 122.6)
-
Step 600
600 (this color)
#647B19
oklch(54.6% 0.122 122.4)
-
Step 700
700
#566A0E
oklch(49.1% 0.113 122.1)
-
Step 800
800
#465711
oklch(42.8% 0.095 122.6)
-
Step 900
900
#3B4817
oklch(37.8% 0.074 122.5)
-
Step 950
950
#222A0F
oklch(27% 0.046 123.2)
#647B19 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) | #837301 | 0.048 |
| Deuteranopia (no green cones) | #807223 | 0.051 |
| Tritanopia (no blue cones) | #6A7469 | 0.103 |
| Achromatopsia (no color) | #727272 | 0.123 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #647B19
#647B19
oklch(54.6% 0.122 122.4)
- #7E5DAB
#7E5DAB
oklch(54.6% 0.122 302)
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 #647B19, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Olive Green #677A04 ΔE 0.008
- Murky Green #6C7A0E ΔE 0.011
- Swamp #698339 ΔE 0.032
- Military Green #667C3E ΔE 0.033
- Muddy Green #657432 ΔE 0.033
- Swamp Green #748500 ΔE 0.040
- Browny Green #6F6C0A ΔE 0.043
- Khaki Green #728639 ΔE 0.044
Use #647B19 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.