#617E8B
Closest named color: Grey Blue (#647D8E). oklch(57.5% 0.039 227.1), rgb(97, 126, 139).
Aa
Black text reads best on this color (4.86:1).
About this color
#617E8B is a medium-dark, muted teal or cyan. In OKLCH its lightness is 58%, its chroma 0.039 and its hue 227°. Its hue sits on the cool side of the wheel. The nearest named color is Grey Blue (#647D8E), ΔE 0.007 away. Black text reads best on it, at 4.86:1.
| Hue family | Teals and cyans |
| Lightness | medium-dark (58%) |
| Chroma | muted (0.039) |
| Temperature | cool |
| Nearest name | Grey Blue (#647D8E) |
| Black text | 4.86:1 |
| White text | 4.31:1 |
Values
| HEX | #617E8B |
| RGB | rgb(97, 126, 139) |
| HSL | hsl(199, 18%, 46%) |
| OKLCH | oklch(57.5% 0.039 227.1) |
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 #617E8B | 4.31:1 | AA large text | Lc -75.3 | Fine for body text |
| Black text on #617E8B | 4.86:1 | AA | Lc 34.2 | Non-text elements, placeholder text |
| #617E8B text on white | 4.31:1 | AA large text | Lc 69.9 | Content text, not long reading |
| #617E8B text on black | 4.86:1 | AA | Lc -31.8 | 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
#F4F6F7
oklch(97.2% 0.003 228.8)
-
Step 100
100
#E6EAEC
oklch(93.5% 0.005 228.8)
-
Step 200
200
#D3DADE
oklch(88.4% 0.009 232.4)
-
Step 300
300
#B5C3C9
oklch(80.8% 0.018 225.2)
-
Step 400
400
#8FA5AE
oklch(70.8% 0.028 224.4)
-
Step 500
500
#738E9A
oklch(63% 0.036 226.7)
-
Step 600
600 (this color)
#617E8B
oklch(57.5% 0.039 227.1)
-
Step 700
700
#4B6571
oklch(49.1% 0.036 228)
-
Step 800
800
#3E535C
oklch(42.8% 0.03 226.1)
-
Step 900
900
#35444B
oklch(37.6% 0.023 228)
-
Step 950
950
#1F282C
oklch(27% 0.015 226.6)
#617E8B 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) | #777D8C | 0.030 |
| Deuteranopia (no green cones) | #71778B | 0.028 |
| Tritanopia (no blue cones) | #548282 | 0.026 |
| Achromatopsia (no color) | #7A7A7A | 0.039 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #617E8B
#617E8B
oklch(57.5% 0.039 227.1)
- #8D7266
#8D7266
oklch(57.5% 0.039 45.2)
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 #617E8B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Grey Blue #647D8E ΔE 0.007
- Battleship Grey #6B7C85 ΔE 0.015
- Slate Gray #708090 ΔE 0.023
- Steel Grey #6F828A ΔE 0.023
- Battleship Gray #6C757D ΔE 0.030
- Steel #738595 ΔE 0.035
- Stormy Blue #507B9C ΔE 0.036
- Metallic Blue #4F738E ΔE 0.043
Use #617E8B 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.