#557191
Closest named color: Metallic Blue (#4F738E). oklch(54% 0.06 252.2), rgb(85, 113, 145).
Aa
White text reads best on this color (5.05:1).
About this color
#557191 is a medium-dark, muted blue. In OKLCH its lightness is 54%, its chroma 0.060 and its hue 252°. Its hue sits on the cool side of the wheel. The nearest named color is Metallic Blue (#4F738E), ΔE 0.011 away. White text reads best on it, at 5.05:1.
| Hue family | Blues |
| Lightness | medium-dark (54%) |
| Chroma | muted (0.060) |
| Temperature | cool |
| Nearest name | Metallic Blue (#4F738E) |
| Black text | 4.15:1 |
| White text | 5.05:1 |
Values
| HEX | #557191 |
| RGB | rgb(85, 113, 145) |
| HSL | hsl(212, 26%, 45%) |
| OKLCH | oklch(54% 0.06 252.2) |
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 #557191 | 5.05:1 | AA | Lc -80.2 | Fine for body text |
| Black text on #557191 | 4.15:1 | AA large text | Lc 29.2 | Dividers and decoration only |
| #557191 text on white | 5.05:1 | AA | Lc 74.9 | Content text, not long reading |
| #557191 text on black | 4.15:1 | AA large text | Lc -26.9 | 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
#D2DAE3
oklch(88.5% 0.015 251.2)
-
Step 300
300
#B4C2D2
oklch(80.8% 0.027 251.7)
-
Step 400
400
#8EA3BB
oklch(70.7% 0.042 251.9)
-
Step 500
500
#718CAB
oklch(63.1% 0.056 252.2)
-
Step 600
600 (this color)
#557191
oklch(54% 0.06 252.2)
-
Step 700
700
#496380
oklch(49.1% 0.056 251.7)
-
Step 800
800
#3C5168
oklch(42.7% 0.046 251.2)
-
Step 900
900
#344355
oklch(37.7% 0.037 253.3)
-
Step 950
950
#1E2731
oklch(26.9% 0.023 251.3)
#557191 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) | #657292 | 0.022 |
| Deuteranopia (no green cones) | #5E6C90 | 0.017 |
| Tritanopia (no blue cones) | #40787C | 0.051 |
| Achromatopsia (no color) | #6F6F6F | 0.060 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #557191
#557191
oklch(54% 0.06 252.2)
- #846947
#846947
oklch(53.9% 0.06 72.4)
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 #557191, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Metallic Blue #4F738E ΔE 0.011
- Dull Blue #49759C ΔE 0.021
- Stormy Blue #507B9C ΔE 0.029
- Cerulean #457B9D ΔE 0.032
- Muted Blue #3B719F ΔE 0.034
- Flat Blue #3C73A8 ΔE 0.042
- Grey Blue #647D8E ΔE 0.044
- Battleship Gray #6C757D ΔE 0.047
Use #557191 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.