#556975
Closest named color: Slate (#516572). oklch(50.9% 0.031 234.5), rgb(85, 105, 117).
Aa
White text reads best on this color (5.73:1).
About this color
#556975 is a medium-dark, muted blue. In OKLCH its lightness is 51%, its chroma 0.031 and its hue 235°. Its hue sits on the cool side of the wheel. The nearest named color is Slate (#516572), ΔE 0.014 away. White text reads best on it, at 5.73:1.
| Hue family | Blues |
| Lightness | medium-dark (51%) |
| Chroma | muted (0.031) |
| Temperature | cool |
| Nearest name | Slate (#516572) |
| Black text | 3.66:1 |
| White text | 5.73:1 |
Values
| HEX | #556975 |
| RGB | rgb(85, 105, 117) |
| HSL | hsl(203, 16%, 40%) |
| OKLCH | oklch(50.9% 0.031 234.5) |
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 #556975 | 5.73:1 | AA | Lc -83.9 | Fine for body text |
| Black text on #556975 | 3.66:1 | AA large text | Lc 25.4 | Dividers and decoration only |
| #556975 text on white | 5.73:1 | AA | Lc 78.7 | Fine for body text |
| #556975 text on black | 3.66:1 | AA large text | Lc -23.1 | 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
#F4F6F6
oklch(97.2% 0.002 197.1)
-
Step 100
100
#E7EAEC
oklch(93.5% 0.004 236.5)
-
Step 200
200
#D4DADE
oklch(88.5% 0.009 236.6)
-
Step 300
300
#B8C2C9
oklch(80.8% 0.015 238.1)
-
Step 400
400
#93A3AD
oklch(70.6% 0.023 235.2)
-
Step 500
500
#788D99
oklch(63.1% 0.03 233)
-
Step 600
600
#617784
oklch(55.6% 0.033 234.1)
-
Step 700
700 (this color)
#556975
oklch(50.9% 0.031 234.5)
-
Step 800
800
#42525B
oklch(42.8% 0.025 232.8)
-
Step 900
900
#38444B
oklch(37.9% 0.02 233.6)
-
Step 950
950
#21282C
oklch(27.2% 0.012 232.9)
#556975 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) | #636876 | 0.020 |
| Deuteranopia (no green cones) | #5F6575 | 0.018 |
| Tritanopia (no blue cones) | #4C6C6D | 0.022 |
| Achromatopsia (no color) | #666666 | 0.031 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #556975
#556975
oklch(50.9% 0.031 234.5)
- #746155
#746155
oklch(50.8% 0.031 54.1)
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 #556975, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Slate #516572 ΔE 0.014
- Dim Gray #696969 ΔE 0.033
- Metallic Blue #4F738E ΔE 0.042
- Battleship Gray #6C757D ΔE 0.051
- Dusty Grape #545775 ΔE 0.055
- Denim #3B638C ΔE 0.055
- YInMn Blue #415A77 ΔE 0.057
- Dull Blue #49759C ΔE 0.062
Use #556975 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.