#645E00
Closest named color: Greeny Brown (#696006). oklch(47.2% 0.1 105.3), rgb(100, 94, 0).
Aa
White text reads best on this color (6.68:1).
About this color
#645E00 is a medium-dark, moderately saturated yellow. In OKLCH its lightness is 47%, its chroma 0.100 and its hue 105°. Its hue sits on the warm side of the wheel. The nearest named color is Greeny Brown (#696006), ΔE 0.011 away. White text reads best on it, at 6.68:1.
| Hue family | Yellows |
| Lightness | medium-dark (47%) |
| Chroma | moderately saturated (0.100) |
| Temperature | warm |
| Nearest name | Greeny Brown (#696006) |
| Black text | 3.14:1 |
| White text | 6.68:1 |
Values
| HEX | #645E00 |
| RGB | rgb(100, 94, 0) |
| HSL | hsl(56, 100%, 20%) |
| OKLCH | oklch(47.2% 0.1 105.3) |
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 #645E00 | 6.68:1 | AA | Lc -87.9 | Fine for body text |
| Black text on #645E00 | 3.14:1 | AA large text | Lc 21.2 | Dividers and decoration only |
| #645E00 text on white | 6.68:1 | AA | Lc 82.8 | Fine for body text |
| #645E00 text on black | 3.14:1 | AA large text | Lc -19.1 | 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 700.
-
Step 50
50
#F6F6F1
oklch(97.2% 0.007 106.5)
-
Step 100
100
#EBEBE0
oklch(93.7% 0.015 106.7)
-
Step 200
200
#DBDAC6
oklch(88.4% 0.027 104.6)
-
Step 300
300
#C5C39F
oklch(80.9% 0.049 104.8)
-
Step 400
400
#A7A46A
oklch(70.7% 0.078 105.7)
-
Step 500
500
#928D40
oklch(63.1% 0.099 105.5)
-
Step 600
600
#7D761B
oklch(55.5% 0.108 104.8)
-
Step 700
700 (this color)
#645E00
oklch(47.2% 0.1 105.3)
-
Step 800
800
#56510F
oklch(42.7% 0.083 104.9)
-
Step 900
900
#474316
oklch(37.7% 0.064 104.2)
-
Step 950
950
#29280E
oklch(27.1% 0.042 106.9)
#645E00 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) | #685A00 | 0.013 |
| Deuteranopia (no green cones) | #6A5E0B | 0.012 |
| Tritanopia (no blue cones) | #6C574F | 0.091 |
| Achromatopsia (no color) | #5C5C5C | 0.100 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #645E00
#645E00
oklch(47.2% 0.1 105.3)
- #575291
#575291
oklch(47.3% 0.1 285.5)
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 #645E00, closest first.
No curated palette has a color within ΔE 0.04 of #645E00.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Greeny Brown #696006 ΔE 0.011
- Mud Green #606602 ΔE 0.024
- Mud #735C12 ΔE 0.029
- Olive Brown #645403 ΔE 0.030
- Camo Green #526525 ΔE 0.032
- Camouflage Green #4B6113 ΔE 0.037
- Army Green #4B5D16 ΔE 0.039
- Dark Olive Green #556B2F ΔE 0.043
Use #645E00 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.