#555D74
Closest named color: Dusty Grape (#545775). oklch(48% 0.038 269.9), rgb(85, 93, 116).
Aa
White text reads best on this color (6.55:1).
About this color
#555D74 is a medium-dark, muted blue. In OKLCH its lightness is 48%, its chroma 0.038 and its hue 270°. Its hue sits on the cool side of the wheel. The nearest named color is Dusty Grape (#545775), ΔE 0.019 away. White text reads best on it, at 6.55:1.
| Hue family | Blues |
| Lightness | medium-dark (48%) |
| Chroma | muted (0.038) |
| Temperature | cool |
| Nearest name | Dusty Grape (#545775) |
| Black text | 3.20:1 |
| White text | 6.55:1 |
Values
| HEX | #555D74 |
| RGB | rgb(85, 93, 116) |
| HSL | hsl(225, 15%, 39%) |
| OKLCH | oklch(48% 0.038 269.9) |
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 #555D74 | 6.55:1 | AA | Lc -87.5 | Fine for body text |
| Black text on #555D74 | 3.20:1 | AA large text | Lc 21.6 | Dividers and decoration only |
| #555D74 text on white | 6.55:1 | AA | Lc 82.5 | Fine for body text |
| #555D74 text on black | 3.20:1 | AA large text | Lc -19.4 | 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
#F5F5F7
oklch(97.1% 0.003 286.4)
-
Step 100
100
#E8EAED
oklch(93.6% 0.005 258.3)
-
Step 200
200
#D6D9E0
oklch(88.5% 0.01 267.4)
-
Step 300
300
#BCC0CD
oklch(80.9% 0.019 272.3)
-
Step 400
400
#99A0B4
oklch(70.7% 0.03 270.3)
-
Step 500
500
#8089A1
oklch(63.1% 0.038 269.1)
-
Step 600
600
#6A738C
oklch(55.7% 0.04 269.5)
-
Step 700
700 (this color)
#555D74
oklch(48% 0.038 269.9)
-
Step 800
800
#484E61
oklch(42.6% 0.033 271.3)
-
Step 900
900
#3C414F
oklch(37.6% 0.025 269.7)
-
Step 950
950
#23262E
oklch(26.9% 0.016 269.1)
#555D74 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) | #565F75 | 0.006 |
| Deuteranopia (no green cones) | #545C73 | 0.004 |
| Tritanopia (no blue cones) | #4D6165 | 0.033 |
| Achromatopsia (no color) | #5D5D5D | 0.039 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #555D74
#555D74
oklch(48% 0.038 269.9)
- #665D45
#665D45
oklch(48% 0.038 89.9)
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 #555D74, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dusty Grape #545775 ΔE 0.019
- Slate #516572 ΔE 0.026
- YInMn Blue #415A77 ΔE 0.031
- Dusk #4E5481 ΔE 0.041
- Denim #3B638C ΔE 0.047
- Dusky Blue #475F94 ΔE 0.053
- Dim Gray #696969 ΔE 0.056
- Light Navy Blue #2E5A88 ΔE 0.059
Use #555D74 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.