#556B63
Closest named color: Dim Gray (#696969). oklch(50.7% 0.029 171), rgb(85, 107, 99).
Aa
White text reads best on this color (5.72:1).
About this color
#556B63 is a medium-dark close to neutral grey. In OKLCH its lightness is 51%, its chroma 0.029. It has too little chroma to lean warm or cool. The nearest named color is Dim Gray (#696969), ΔE 0.032 away. White text reads best on it, at 5.72:1.
| Hue family | Neutrals |
| Lightness | medium-dark (51%) |
| Chroma | close to neutral grey (0.029) |
| Temperature | neutral |
| Nearest name | Dim Gray (#696969) |
| Black text | 3.66:1 |
| White text | 5.72:1 |
Values
| HEX | #556B63 |
| RGB | rgb(85, 107, 99) |
| HSL | hsl(158, 11%, 38%) |
| OKLCH | oklch(50.7% 0.029 171) |
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 #556B63 | 5.72:1 | AA | Lc -83.9 | Fine for body text |
| Black text on #556B63 | 3.66:1 | AA large text | Lc 25.4 | Dividers and decoration only |
| #556B63 text on white | 5.72:1 | AA | Lc 78.6 | Fine for body text |
| #556B63 text on black | 3.66:1 | AA large text | Lc -23.2 | 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
#F4F6F5
oklch(97.1% 0.002 165.1)
-
Step 100
100
#E7EBE9
oklch(93.6% 0.005 165)
-
Step 200
200
#D4DBD8
oklch(88.5% 0.009 168.7)
-
Step 300
300
#B8C4BF
oklch(81% 0.015 169.1)
-
Step 400
400
#93A59F
oklch(70.6% 0.022 173.6)
-
Step 500
500
#798F87
oklch(63% 0.028 171.4)
-
Step 600
600
#617A71
oklch(55.7% 0.032 171.2)
-
Step 700
700 (this color)
#556B63
oklch(50.7% 0.029 171)
-
Step 800
800
#42534D
oklch(42.6% 0.023 171.7)
-
Step 900
900
#384540
oklch(37.7% 0.019 170)
-
Step 950
950
#212826
oklch(26.9% 0.011 176.4)
#556B63 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) | #6A6863 | 0.031 |
| Deuteranopia (no green cones) | #656564 | 0.029 |
| Tritanopia (no blue cones) | #506B69 | 0.011 |
| Achromatopsia (no color) | #666666 | 0.029 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #556B63
#556B63
oklch(50.7% 0.029 171)
- #735F67
#735F67
oklch(50.8% 0.028 352.1)
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 #556B63, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dim Gray #696969 ΔE 0.032
- Slate #516572 ΔE 0.035
- Battleship Gray #6C757D ΔE 0.058
- Dark Aquamarine #017371 ΔE 0.060
- Deep Turquoise #017374 ΔE 0.061
- Dark Moss Green #606C38 ΔE 0.062
- Dark Aqua #05696B ΔE 0.065
- Metallic Blue #4F738E ΔE 0.065
Use #556B63 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.