#578186
Closest named color: Grey Blue (#647D8E). oklch(57.4% 0.047 205.3), rgb(87, 129, 134).
Aa
Black text reads best on this color (4.88:1).
About this color
#578186 is a medium-dark, muted teal or cyan. In OKLCH its lightness is 57%, its chroma 0.047 and its hue 205°. Its hue sits on the cool side of the wheel. The nearest named color is Grey Blue (#647D8E), ΔE 0.025 away. Black text reads best on it, at 4.88:1.
| Hue family | Teals and cyans |
| Lightness | medium-dark (57%) |
| Chroma | muted (0.047) |
| Temperature | cool |
| Nearest name | Grey Blue (#647D8E) |
| Black text | 4.88:1 |
| White text | 4.29:1 |
Values
| HEX | #578186 |
| RGB | rgb(87, 129, 134) |
| HSL | hsl(186, 21%, 43%) |
| OKLCH | oklch(57.4% 0.047 205.3) |
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 #578186 | 4.29:1 | AA large text | Lc -75.1 | Fine for body text |
| Black text on #578186 | 4.88:1 | AA | Lc 34.4 | Non-text elements, placeholder text |
| #578186 text on white | 4.29:1 | AA large text | Lc 69.7 | Content text, not long reading |
| #578186 text on black | 4.88:1 | AA | Lc -32.0 | Non-text elements, placeholder text |
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
#F3F6F6
oklch(97.1% 0.003 197.1)
-
Step 100
100
#E5EBEC
oklch(93.6% 0.007 208.8)
-
Step 200
200
#D1DBDD
oklch(88.4% 0.011 211)
-
Step 300
300
#B2C5C7
oklch(81% 0.021 204.4)
-
Step 400
400
#89A7AB
oklch(70.7% 0.034 206.4)
-
Step 500
500
#6B9196
oklch(63% 0.043 206.2)
-
Step 600
600 (this color)
#578186
oklch(57.4% 0.047 205.3)
-
Step 700
700
#42686D
oklch(49.1% 0.044 206.3)
-
Step 800
800
#375558
oklch(42.7% 0.036 203.8)
-
Step 900
900
#304649
oklch(37.7% 0.028 206.6)
-
Step 950
950
#1C292B
oklch(27% 0.018 207.9)
#578186 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) | #7B7E86 | 0.047 |
| Deuteranopia (no green cones) | #727786 | 0.043 |
| Tritanopia (no blue cones) | #458482 | 0.022 |
| Achromatopsia (no color) | #7A7A7A | 0.047 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #578186
#578186
oklch(57.4% 0.047 205.3)
- #936E6B
#936E6B
oklch(57.4% 0.048 23.9)
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 #578186, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Grey Blue #647D8E ΔE 0.025
- Battleship Grey #6B7C85 ΔE 0.027
- Steel Grey #6F828A ΔE 0.032
- Slate Gray #708090 ΔE 0.037
- Battleship Gray #6C757D ΔE 0.040
- Stormy Blue #507B9C ΔE 0.044
- Steel #738595 ΔE 0.045
- Dusty Teal #4C9085 ΔE 0.046
Use #578186 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.