#645F01
Closest named color: Greeny Brown (#696006). oklch(47.5% 0.101 106.1), rgb(100, 95, 1).
Aa
White text reads best on this color (6.60:1).
About this color
#645F01 is a medium-dark, moderately saturated yellow. In OKLCH its lightness is 47%, its chroma 0.101 and its hue 106°. Its hue sits on the warm side of the wheel. The nearest named color is Greeny Brown (#696006), ΔE 0.010 away. White text reads best on it, at 6.60:1.
| Hue family | Yellows |
| Lightness | medium-dark (47%) |
| Chroma | moderately saturated (0.101) |
| Temperature | warm |
| Nearest name | Greeny Brown (#696006) |
| Black text | 3.17:1 |
| White text | 6.60:1 |
Values
| HEX | #645F01 |
| RGB | rgb(100, 95, 1) |
| HSL | hsl(57, 98%, 20%) |
| OKLCH | oklch(47.5% 0.101 106.1) |
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 #645F01 | 6.60:1 | AA | Lc -87.6 | Fine for body text |
| Black text on #645F01 | 3.17:1 | AA large text | Lc 21.5 | Dividers and decoration only |
| #645F01 text on white | 6.60:1 | AA | Lc 82.5 | Fine for body text |
| #645F01 text on black | 3.17:1 | AA large text | Lc -19.4 | 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
#DBDBC6
oklch(88.6% 0.028 107)
-
Step 300
300
#C4C39F
oklch(80.9% 0.049 106.1)
-
Step 400
400
#A7A46A
oklch(70.7% 0.078 105.7)
-
Step 500
500
#918D40
oklch(63% 0.099 106.2)
-
Step 600
600
#7C771B
oklch(55.7% 0.109 106.2)
-
Step 700
700 (this color)
#645F01
oklch(47.5% 0.101 106.1)
-
Step 800
800
#55510F
oklch(42.6% 0.083 105.8)
-
Step 900
900
#464416
oklch(37.8% 0.065 106.8)
-
Step 950
950
#29280E
oklch(27.1% 0.042 106.9)
#645F01 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) | #685B00 | 0.013 |
| Deuteranopia (no green cones) | #6A5E0C | 0.012 |
| Tritanopia (no blue cones) | #6C5850 | 0.092 |
| Achromatopsia (no color) | #5D5D5D | 0.101 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #645F01
#645F01
oklch(47.5% 0.101 106.1)
- #585292
#585292
oklch(47.4% 0.101 286.1)
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 #645F01, closest first.
No curated palette has a color within ΔE 0.04 of #645F01.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Greeny Brown #696006 ΔE 0.010
- Mud Green #606602 ΔE 0.021
- Mud #735C12 ΔE 0.030
- Camo Green #526525 ΔE 0.031
- Olive Brown #645403 ΔE 0.033
- Camouflage Green #4B6113 ΔE 0.037
- Army Green #4B5D16 ΔE 0.039
- Dark Olive Green #556B2F ΔE 0.041
Use #645F01 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.