#666E59
Closest named color: Dim Gray (#696969). oklch(52.5% 0.033 124.5), rgb(102, 110, 89).
Aa
White text reads best on this color (5.33:1).
About this color
#666E59 is a medium-dark, muted yellow. In OKLCH its lightness is 53%, its chroma 0.033 and its hue 125°. 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 5.33:1.
| Hue family | Yellows |
| Lightness | medium-dark (53%) |
| Chroma | muted (0.033) |
| Temperature | in between |
| Nearest name | Dim Gray (#696969) |
| Black text | 3.93:1 |
| White text | 5.33:1 |
Values
| HEX | #666E59 |
| RGB | rgb(102, 110, 89) |
| HSL | hsl(83, 11%, 39%) |
| OKLCH | oklch(52.5% 0.033 124.5) |
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 #666E59 | 5.33:1 | AA | Lc -81.9 | Fine for body text |
| Black text on #666E59 | 3.93:1 | AA large text | Lc 27.5 | Dividers and decoration only |
| #666E59 text on white | 5.33:1 | AA | Lc 76.5 | Fine for body text |
| #666E59 text on black | 3.93:1 | AA large text | Lc -25.2 | 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
#F5F6F4
oklch(97.2% 0.003 128.5)
-
Step 100
100
#E9EAE7
oklch(93.5% 0.004 121.6)
-
Step 200
200
#D8DAD4
oklch(88.5% 0.008 121.6)
-
Step 300
300
#BEC2B8
oklch(80.8% 0.014 124.6)
-
Step 400
400
#9DA393
oklch(70.6% 0.024 123.8)
-
Step 500
500
#858D79
oklch(63.1% 0.031 125.1)
-
Step 600
600 (this color)
#666E59
oklch(52.5% 0.033 124.5)
-
Step 700
700
#5D6451
oklch(49.1% 0.031 124)
-
Step 800
800
#4C5242
oklch(42.8% 0.027 124.2)
-
Step 900
900
#3F4438
oklch(37.8% 0.021 125.8)
-
Step 950
950
#252821
oklch(27.1% 0.013 126.2)
#666E59 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) | #716B58 | 0.018 |
| Deuteranopia (no green cones) | #6F6B5A | 0.016 |
| Tritanopia (no blue cones) | #676C68 | 0.026 |
| Achromatopsia (no color) | #6B6B6B | 0.033 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #666E59
#666E59
oklch(52.5% 0.033 124.5)
- #6F667A
#6F667A
oklch(52.6% 0.033 305.6)
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 #666E59, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dim Gray #696969 ΔE 0.034
- Grey Brown #7F7053 ΔE 0.040
- Dark Taupe #7F684E ΔE 0.040
- Dark Moss Green #606C38 ΔE 0.046
- Dull Brown #876E4B ΔE 0.053
- Battleship Gray #6C757D ΔE 0.055
- Dirt Brown #836539 ΔE 0.056
- Muddy Green #657432 ΔE 0.060
Use #666E59 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.