#557491
Closest named color: Metallic Blue (#4F738E). oklch(54.7% 0.058 247.2), rgb(85, 116, 145).
Aa
White text reads best on this color (4.89:1).
About this color
#557491 is a medium-dark, muted blue. In OKLCH its lightness is 55%, its chroma 0.058 and its hue 247°. Its hue sits on the cool side of the wheel. The nearest named color is Metallic Blue (#4F738E), ΔE 0.009 away. White text reads best on it, at 4.89:1.
| Hue family | Blues |
| Lightness | medium-dark (55%) |
| Chroma | muted (0.058) |
| Temperature | cool |
| Nearest name | Metallic Blue (#4F738E) |
| Black text | 4.29:1 |
| White text | 4.89:1 |
Values
| HEX | #557491 |
| RGB | rgb(85, 116, 145) |
| HSL | hsl(209, 26%, 45%) |
| OKLCH | oklch(54.7% 0.058 247.2) |
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 #557491 | 4.89:1 | AA | Lc -79.3 | Fine for body text |
| Black text on #557491 | 4.29:1 | AA large text | Lc 30.2 | Non-text elements, placeholder text |
| #557491 text on white | 4.89:1 | AA | Lc 73.9 | Content text, not long reading |
| #557491 text on black | 4.29:1 | AA large text | Lc -27.8 | 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
#F4F6F8
oklch(97.2% 0.003 247.9)
-
Step 100
100
#E6EAEF
oklch(93.5% 0.008 253.9)
-
Step 200
200
#D2DAE2
oklch(88.5% 0.014 248)
-
Step 300
300
#B4C3D1
oklch(81% 0.026 246.3)
-
Step 400
400
#8CA4BA
oklch(70.8% 0.042 246.1)
-
Step 500
500
#708DA9
oklch(63.2% 0.054 247.8)
-
Step 600
600 (this color)
#557491
oklch(54.7% 0.058 247.2)
-
Step 700
700
#48647E
oklch(49.2% 0.053 247.1)
-
Step 800
800
#3B5166
oklch(42.6% 0.044 247.7)
-
Step 900
900
#334353
oklch(37.6% 0.034 248.8)
-
Step 950
950
#1E2831
oklch(27.1% 0.022 245.9)
#557491 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) | #687492 | 0.025 |
| Deuteranopia (no green cones) | #616E90 | 0.022 |
| Tritanopia (no blue cones) | #3F7B7E | 0.049 |
| Achromatopsia (no color) | #717171 | 0.058 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #557491
#557491
oklch(54.7% 0.058 247.2)
- #886A4C
#886A4C
oklch(54.7% 0.058 66.1)
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 #557491, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Metallic Blue #4F738E ΔE 0.009
- Dull Blue #49759C ΔE 0.020
- Stormy Blue #507B9C ΔE 0.023
- Cerulean #457B9D ΔE 0.026
- Grey Blue #647D8E ΔE 0.036
- Muted Blue #3B719F ΔE 0.038
- Battleship Gray #6C757D ΔE 0.043
- Flat Blue #3C73A8 ΔE 0.044
Use #557491 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.