#557586
Closest named color: Metallic Blue (#4F738E). oklch(54.4% 0.045 231.8), rgb(85, 117, 134).
Aa
White text reads best on this color (4.91:1).
About this color
#557586 is a medium-dark, muted blue. In OKLCH its lightness is 54%, its chroma 0.045 and its hue 232°. Its hue sits on the cool side of the wheel. The nearest named color is Metallic Blue (#4F738E), ΔE 0.017 away. White text reads best on it, at 4.91:1.
| Hue family | Blues |
| Lightness | medium-dark (54%) |
| Chroma | muted (0.045) |
| Temperature | cool |
| Nearest name | Metallic Blue (#4F738E) |
| Black text | 4.27:1 |
| White text | 4.91:1 |
Values
| HEX | #557586 |
| RGB | rgb(85, 117, 134) |
| HSL | hsl(201, 22%, 43%) |
| OKLCH | oklch(54.4% 0.045 231.8) |
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 #557586 | 4.91:1 | AA | Lc -79.4 | Fine for body text |
| Black text on #557586 | 4.27:1 | AA large text | Lc 30.1 | Non-text elements, placeholder text |
| #557586 text on white | 4.91:1 | AA | Lc 74.0 | Content text, not long reading |
| #557586 text on black | 4.27:1 | AA large text | Lc -27.7 | 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
#F4F6F7
oklch(97.2% 0.003 228.8)
-
Step 100
100
#E6EBED
oklch(93.7% 0.006 223.5)
-
Step 200
200
#D2DBDF
oklch(88.6% 0.011 226)
-
Step 300
300
#B4C3CC
oklch(80.8% 0.021 233.9)
-
Step 400
400
#8DA5B2
oklch(70.8% 0.033 231.5)
-
Step 500
500
#708E9F
oklch(63% 0.042 233.2)
-
Step 600
600 (this color)
#557586
oklch(54.4% 0.045 231.8)
-
Step 700
700
#486575
oklch(49% 0.043 232.9)
-
Step 800
800
#3C535F
oklch(42.8% 0.034 231.3)
-
Step 900
900
#33444E
oklch(37.6% 0.028 234.3)
-
Step 950
950
#1E282D
oklch(27% 0.017 229.8)
#557586 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) | #6D7487 | 0.032 |
| Deuteranopia (no green cones) | #666E86 | 0.029 |
| Tritanopia (no blue cones) | #447A7A | 0.034 |
| Achromatopsia (no color) | #717171 | 0.046 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #557586
#557586
oklch(54.4% 0.045 231.8)
- #866958
#866958
oklch(54.5% 0.045 51.8)
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 #557586, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Metallic Blue #4F738E ΔE 0.017
- Battleship Gray #6C757D ΔE 0.032
- Grey Blue #647D8E ΔE 0.033
- Stormy Blue #507B9C ΔE 0.034
- Dull Blue #49759C ΔE 0.036
- Cerulean #457B9D ΔE 0.037
- Battleship Grey #6B7C85 ΔE 0.038
- Slate #516572 ΔE 0.051
Use #557586 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.