#666C56
Closest named color: Dim Gray (#696969). oklch(52% 0.034 120), rgb(102, 108, 86).
Aa
White text reads best on this color (5.46:1).
About this color
#666C56 is a medium-dark, muted yellow. In OKLCH its lightness is 52%, its chroma 0.034 and its hue 120°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Dim Gray (#696969), ΔE 0.034 away. White text reads best on it, at 5.46:1.
| Hue family | Yellows |
| Lightness | medium-dark (52%) |
| Chroma | muted (0.034) |
| Temperature | in between |
| Nearest name | Dim Gray (#696969) |
| Black text | 3.84:1 |
| White text | 5.46:1 |
Values
| HEX | #666C56 |
| RGB | rgb(102, 108, 86) |
| HSL | hsl(76, 11%, 38%) |
| OKLCH | oklch(52% 0.034 120) |
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 #666C56 | 5.46:1 | AA | Lc -82.6 | Fine for body text |
| Black text on #666C56 | 3.84:1 | AA large text | Lc 26.8 | Dividers and decoration only |
| #666C56 text on white | 5.46:1 | AA | Lc 77.3 | Fine for body text |
| #666C56 text on black | 3.84:1 | AA large text | Lc -24.5 | 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
#F5F6F4
oklch(97.2% 0.003 128.5)
-
Step 100
100
#E9EAE7
oklch(93.5% 0.004 121.6)
-
Step 200
200
#D8DAD3
oklch(88.5% 0.01 119.6)
-
Step 300
300
#BFC2B7
oklch(80.9% 0.016 119.2)
-
Step 400
400
#9EA391
oklch(70.6% 0.026 119.7)
-
Step 500
500
#868D76
oklch(63.1% 0.034 121.2)
-
Step 600
600
#70775F
oklch(55.6% 0.037 120.8)
-
Step 700
700 (this color)
#666C56
oklch(52% 0.034 120)
-
Step 800
800
#4D5140
oklch(42.6% 0.028 118.3)
-
Step 900
900
#404336
oklch(37.6% 0.022 118)
-
Step 950
950
#252820
oklch(27.1% 0.015 124.1)
#666C56 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) | #6F6955 | 0.015 |
| Deuteranopia (no green cones) | #6E6957 | 0.015 |
| Tritanopia (no blue cones) | #686A66 | 0.028 |
| Achromatopsia (no color) | #696969 | 0.034 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #666C56
#666C56
oklch(52% 0.034 120)
- #6C657A
#6C657A
oklch(52.1% 0.034 300.4)
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 #666C56, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dim Gray #696969 ΔE 0.034
- Dark Taupe #7F684E ΔE 0.039
- Grey Brown #7F7053 ΔE 0.042
- Dark Moss Green #606C38 ΔE 0.043
- Dirt Brown #836539 ΔE 0.054
- Dull Brown #876E4B ΔE 0.054
- Battleship Gray #6C757D ΔE 0.059
- Muddy Green #657432 ΔE 0.060
Use #666C56 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.