#66570F
Closest named color: Olive Brown (#645403). oklch(45.8% 0.088 96.4), rgb(102, 87, 15).
Aa
White text reads best on this color (7.15:1).
About this color
#66570F is a medium-dark, moderately saturated brown. In OKLCH its lightness is 46%, its chroma 0.088 and its hue 96°. Its hue sits on the warm side of the wheel. The nearest named color is Olive Brown (#645403), ΔE 0.010 away. White text reads best on it, at 7.15:1.
| Hue family | Browns |
| Lightness | medium-dark (46%) |
| Chroma | moderately saturated (0.088) |
| Temperature | warm |
| Nearest name | Olive Brown (#645403) |
| Black text | 2.93:1 |
| White text | 7.15:1 |
Values
| HEX | #66570F |
| RGB | rgb(102, 87, 15) |
| HSL | hsl(50, 74%, 23%) |
| OKLCH | oklch(45.8% 0.088 96.4) |
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 #66570F | 7.15:1 | AAA | Lc -89.6 | Fine for body text |
| Black text on #66570F | 2.93:1 | Fails | Lc 19.3 | Dividers and decoration only |
| #66570F text on white | 7.15:1 | AAA | Lc 84.7 | Fine for body text |
| #66570F text on black | 2.93:1 | Fails | Lc -17.3 | 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 800.
-
Step 50
50
#F7F5F0
oklch(97% 0.007 88.6)
-
Step 100
100
#ECEADF
oklch(93.6% 0.015 98.3)
-
Step 200
200
#DEDAC5
oklch(88.6% 0.028 98.1)
-
Step 300
300
#CAC19C
oklch(80.9% 0.051 95.9)
-
Step 400
400
#AFA164
oklch(70.7% 0.082 96.8)
-
Step 500
500
#9C8936
oklch(63.1% 0.105 96.3)
-
Step 600
600
#877201
oklch(55.5% 0.114 96.2)
-
Step 700
700
#726000
oklch(49.2% 0.101 96.3)
-
Step 800
800 (this color)
#66570F
oklch(45.8% 0.088 96.4)
-
Step 900
900
#4C410F
oklch(37.6% 0.068 96.3)
-
Step 950
950
#2D260B
oklch(27% 0.043 94.8)
#66570F 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) | #615500 | 0.013 |
| Deuteranopia (no green cones) | #655A14 | 0.008 |
| Tritanopia (no blue cones) | #6F4F4A | 0.082 |
| Achromatopsia (no color) | #585858 | 0.088 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #66570F
#66570F
oklch(45.8% 0.088 96.4)
- #4B5288
#4B5288
oklch(45.8% 0.088 276.7)
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 #66570F, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Olive Brown #645403 ΔE 0.010
- Mud #735C12 ΔE 0.028
- Greeny Brown #696006 ΔE 0.029
- Green Brown #544E03 ΔE 0.044
- Army Green #4B5D16 ΔE 0.044
- Camo Green #526525 ΔE 0.046
- Mud Green #606602 ΔE 0.047
- Medium Brown #7F5112 ΔE 0.048
Use #66570F 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.