#557597
Closest named color: Dull Blue (#49759C). oklch(55.2% 0.065 250.5), rgb(85, 117, 151).
Aa
White text reads best on this color (4.79:1).
About this color
#557597 is a medium-dark, muted blue. In OKLCH its lightness is 55%, its chroma 0.065 and its hue 251°. Its hue sits on the cool side of the wheel. The nearest named color is Dull Blue (#49759C), ΔE 0.015 away. White text reads best on it, at 4.79:1.
| Hue family | Blues |
| Lightness | medium-dark (55%) |
| Chroma | muted (0.065) |
| Temperature | cool |
| Nearest name | Dull Blue (#49759C) |
| Black text | 4.37:1 |
| White text | 4.79:1 |
Values
| HEX | #557597 |
| RGB | rgb(85, 117, 151) |
| HSL | hsl(211, 28%, 46%) |
| OKLCH | oklch(55.2% 0.065 250.5) |
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 #557597 | 4.79:1 | AA | Lc -78.7 | Fine for body text |
| Black text on #557597 | 4.37:1 | AA large text | Lc 30.8 | Non-text elements, placeholder text |
| #557597 text on white | 4.79:1 | AA | Lc 73.2 | Content text, not long reading |
| #557597 text on black | 4.37:1 | AA large text | Lc -28.5 | 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
#F3F6F8
oklch(97.1% 0.004 236.5)
-
Step 100
100
#E6EAEF
oklch(93.5% 0.008 253.9)
-
Step 200
200
#D1DAE4
oklch(88.4% 0.017 250.9)
-
Step 300
300
#B3C2D3
oklch(80.8% 0.029 251.5)
-
Step 400
400
#8BA3BD
oklch(70.6% 0.047 250.6)
-
Step 500
500
#6E8DAD
oklch(63.2% 0.06 249.6)
-
Step 600
600 (this color)
#557597
oklch(55.2% 0.065 250.5)
-
Step 700
700
#466382
oklch(49% 0.061 250.8)
-
Step 800
800
#3A516A
oklch(42.7% 0.05 251.1)
-
Step 900
900
#324356
oklch(37.7% 0.039 251.6)
-
Step 950
950
#1D2732
oklch(26.8% 0.025 251.2)
#557597 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) | #687699 | 0.026 |
| Deuteranopia (no green cones) | #606F96 | 0.021 |
| Tritanopia (no blue cones) | #3C7D80 | 0.057 |
| Achromatopsia (no color) | #727272 | 0.065 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #557597
#557597
oklch(55.2% 0.065 250.5)
- #8A6C47
#8A6C47
oklch(55.2% 0.065 71.7)
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 #557597, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dull Blue #49759C ΔE 0.015
- Metallic Blue #4F738E ΔE 0.017
- Stormy Blue #507B9C ΔE 0.017
- Cerulean #457B9D ΔE 0.022
- Muted Blue #3B719F ΔE 0.034
- Grey Blue #647D8E ΔE 0.037
- Flat Blue #3C73A8 ΔE 0.038
- Battleship Gray #6C757D ΔE 0.049
Use #557597 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.