#55737D
Closest named color: Metallic Blue (#4F738E). oklch(53.6% 0.038 220.4), rgb(85, 115, 125).
Aa
White text reads best on this color (5.07:1).
About this color
#55737D is a medium-dark, muted teal or cyan. In OKLCH its lightness is 54%, its chroma 0.038 and its hue 220°. Its hue sits on the cool side of the wheel. The nearest named color is Metallic Blue (#4F738E), ΔE 0.028 away. White text reads best on it, at 5.07:1.
| Hue family | Teals and cyans |
| Lightness | medium-dark (54%) |
| Chroma | muted (0.038) |
| Temperature | cool |
| Nearest name | Metallic Blue (#4F738E) |
| Black text | 4.13:1 |
| White text | 5.07:1 |
Values
| HEX | #55737D |
| RGB | rgb(85, 115, 125) |
| HSL | hsl(195, 19%, 41%) |
| OKLCH | oklch(53.6% 0.038 220.4) |
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 #55737D | 5.07:1 | AA | Lc -80.4 | Fine for body text |
| Black text on #55737D | 4.13:1 | AA large text | Lc 29.0 | Dividers and decoration only |
| #55737D text on white | 5.07:1 | AA | Lc 75.0 | Fine for body text |
| #55737D text on black | 4.13:1 | AA large text | Lc -26.7 | 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
#F4F6F6
oklch(97.2% 0.002 197.1)
-
Step 100
100
#E6EBEC
oklch(93.7% 0.006 211)
-
Step 200
200
#D3DBDD
oklch(88.6% 0.009 214.3)
-
Step 300
300
#B5C3C8
oklch(80.8% 0.017 221.1)
-
Step 400
400
#8FA5AD
oklch(70.8% 0.027 221.7)
-
Step 500
500
#738F98
oklch(63.2% 0.034 219.3)
-
Step 600
600 (this color)
#55737D
oklch(53.6% 0.038 220.4)
-
Step 700
700
#4A666F
oklch(49.2% 0.036 219.7)
-
Step 800
800
#3D535A
oklch(42.7% 0.029 219.4)
-
Step 900
900
#34454A
oklch(37.8% 0.023 217.7)
-
Step 950
950
#1F282B
oklch(26.9% 0.014 220.1)
#55737D 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) | #6D717E | 0.033 |
| Deuteranopia (no green cones) | #666C7D | 0.029 |
| Tritanopia (no blue cones) | #487676 | 0.023 |
| Achromatopsia (no color) | #6E6E6E | 0.038 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #55737D
#55737D
oklch(53.6% 0.038 220.4)
- #82665D
#82665D
oklch(53.5% 0.039 38.6)
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 #55737D, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Metallic Blue #4F738E ΔE 0.028
- Battleship Gray #6C757D ΔE 0.032
- Dim Gray #696969 ΔE 0.041
- Grey Blue #647D8E ΔE 0.042
- Battleship Grey #6B7C85 ΔE 0.042
- Slate #516572 ΔE 0.042
- Stormy Blue #507B9C ΔE 0.048
- Dull Blue #49759C ΔE 0.049
Use #55737D 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.