#666551
Closest named color: Dim Gray (#696969). oklch(50.2% 0.03 105.1), rgb(102, 101, 81).
Aa
White text reads best on this color (5.92:1).
About this color
#666551 is a medium-dark, muted yellow. In OKLCH its lightness is 50%, its chroma 0.030 and its hue 105°. Its hue sits on the warm side of the wheel. The nearest named color is Dim Gray (#696969), ΔE 0.036 away. White text reads best on it, at 5.92:1.
| Hue family | Yellows |
| Lightness | medium-dark (50%) |
| Chroma | muted (0.030) |
| Temperature | warm |
| Nearest name | Dim Gray (#696969) |
| Black text | 3.54:1 |
| White text | 5.92:1 |
Values
| HEX | #666551 |
| RGB | rgb(102, 101, 81) |
| HSL | hsl(57, 11%, 36%) |
| OKLCH | oklch(50.2% 0.03 105.1) |
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 #666551 | 5.92:1 | AA | Lc -84.9 | Fine for body text |
| Black text on #666551 | 3.54:1 | AA large text | Lc 24.4 | Dividers and decoration only |
| #666551 text on white | 5.92:1 | AA | Lc 79.6 | Fine for body text |
| #666551 text on black | 3.54:1 | AA large text | Lc -22.2 | 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 700.
-
Step 50
50
#F5F5F4
oklch(97% 0.001 106.4)
-
Step 100
100
#EAEAE7
oklch(93.6% 0.004 106.5)
-
Step 200
200
#DAD9D3
oklch(88.4% 0.008 98.9)
-
Step 300
300
#C2C1B7
oklch(80.9% 0.014 102.1)
-
Step 400
400
#A2A291
oklch(70.7% 0.024 107)
-
Step 500
500
#8C8B76
oklch(63.2% 0.03 105)
-
Step 600
600
#76755F
oklch(55.7% 0.033 105.3)
-
Step 700
700 (this color)
#666551
oklch(50.2% 0.03 105.1)
-
Step 800
800
#515040
oklch(42.7% 0.025 104.5)
-
Step 900
900
#434236
oklch(37.6% 0.02 103.4)
-
Step 950
950
#272720
oklch(27% 0.013 107.2)
#666551 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) | #696350 | 0.007 |
| Deuteranopia (no green cones) | #696452 | 0.006 |
| Tritanopia (no blue cones) | #69625F | 0.027 |
| Achromatopsia (no color) | #646464 | 0.031 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #666551
#666551
oklch(50.2% 0.03 105.1)
- #626275
#626275
oklch(50.3% 0.03 285.3)
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 #666551, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dim Gray #696969 ΔE 0.036
- Dark Taupe #7F684E ΔE 0.043
- Dark Moss Green #606C38 ΔE 0.048
- Grey Brown #7F7053 ΔE 0.054
- Dirt Brown #836539 ΔE 0.054
- Cocoa #875F42 ΔE 0.056
- Slate #516572 ΔE 0.057
- Dark Olive Green #556B2F ΔE 0.062
Use #666551 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.