#556D7E
Closest named color: Metallic Blue (#4F738E). oklch(52.2% 0.039 239.3), rgb(85, 109, 126).
Aa
White text reads best on this color (5.41:1).
About this color
#556D7E is a medium-dark, muted blue. In OKLCH its lightness is 52%, its chroma 0.039 and its hue 239°. Its hue sits on the cool side of the wheel. The nearest named color is Metallic Blue (#4F738E), ΔE 0.026 away. White text reads best on it, at 5.41:1.
| Hue family | Blues |
| Lightness | medium-dark (52%) |
| Chroma | muted (0.039) |
| Temperature | cool |
| Nearest name | Metallic Blue (#4F738E) |
| Black text | 3.87:1 |
| White text | 5.41:1 |
Values
| HEX | #556D7E |
| RGB | rgb(85, 109, 126) |
| HSL | hsl(205, 19%, 41%) |
| OKLCH | oklch(52.2% 0.039 239.3) |
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 #556D7E | 5.41:1 | AA | Lc -82.3 | Fine for body text |
| Black text on #556D7E | 3.87:1 | AA large text | Lc 27.1 | Dividers and decoration only |
| #556D7E text on white | 5.41:1 | AA | Lc 77.0 | Fine for body text |
| #556D7E text on black | 3.87:1 | AA large text | Lc -24.7 | 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 700.
-
Step 50
50
#F4F6F7
oklch(97.2% 0.003 228.8)
-
Step 100
100
#E7EAED
oklch(93.6% 0.005 247.9)
-
Step 200
200
#D3DADF
oklch(88.4% 0.01 238.5)
-
Step 300
300
#B6C3CC
oklch(81% 0.019 237.8)
-
Step 400
400
#90A4B2
oklch(70.8% 0.03 238.4)
-
Step 500
500
#758D9F
oklch(63.1% 0.039 240.7)
-
Step 600
600
#5D778A
oklch(55.6% 0.042 240.2)
-
Step 700
700 (this color)
#556D7E
oklch(52.2% 0.039 239.3)
-
Step 800
800
#3F525F
oklch(42.8% 0.032 238.4)
-
Step 900
900
#35444E
oklch(37.8% 0.026 237.6)
-
Step 950
950
#1F282E
oklch(27.1% 0.017 237.4)
#556D7E 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) | #666C7F | 0.024 |
| Deuteranopia (no green cones) | #60687E | 0.020 |
| Tritanopia (no blue cones) | #487172 | 0.031 |
| Achromatopsia (no color) | #6A6A6A | 0.039 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #556D7E
#556D7E
oklch(52.2% 0.039 239.3)
- #7B6453
#7B6453
oklch(52.1% 0.039 58.2)
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 #556D7E, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Metallic Blue #4F738E ΔE 0.026
- Slate #516572 ΔE 0.028
- Dim Gray #696969 ΔE 0.039
- Battleship Gray #6C757D ΔE 0.042
- Dull Blue #49759C ΔE 0.047
- Stormy Blue #507B9C ΔE 0.053
- Denim #3B638C ΔE 0.054
- Grey Blue #647D8E ΔE 0.054
Use #556D7E 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.