#617F8E
Closest named color: Grey Blue (#647D8E). oklch(57.9% 0.041 230), rgb(97, 127, 142).
Aa
Black text reads best on this color (4.93:1).
About this color
#617F8E is a medium-dark, muted teal or cyan. In OKLCH its lightness is 58%, its chroma 0.041 and its hue 230°. 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 4.93:1.
| Hue family | Teals and cyans |
| Lightness | medium-dark (58%) |
| Chroma | muted (0.041) |
| Temperature | cool |
| Nearest name | Grey Blue (#647D8E) |
| Black text | 4.93:1 |
| White text | 4.25:1 |
Values
| HEX | #617F8E |
| RGB | rgb(97, 127, 142) |
| HSL | hsl(200, 19%, 47%) |
| OKLCH | oklch(57.9% 0.041 230) |
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 #617F8E | 4.25:1 | AA large text | Lc -74.9 | Content text, not long reading |
| Black text on #617F8E | 4.93:1 | AA | Lc 34.7 | Non-text elements, placeholder text |
| #617F8E text on white | 4.25:1 | AA large text | Lc 69.4 | Content text, not long reading |
| #617F8E text on black | 4.93:1 | AA | Lc -32.3 | 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
#E6EAED
oklch(93.5% 0.006 239.8)
-
Step 200
200
#D3DADF
oklch(88.4% 0.01 238.5)
-
Step 300
300
#B5C3CA
oklch(80.9% 0.018 229.1)
-
Step 400
400
#8EA5B0
oklch(70.8% 0.03 228.3)
-
Step 500
500
#728E9C
oklch(63% 0.038 229.7)
-
Step 600
600 (this color)
#617F8E
oklch(57.9% 0.041 230)
-
Step 700
700
#4A6573
oklch(49.1% 0.039 231.1)
-
Step 800
800
#3D535D
oklch(42.8% 0.032 227.6)
-
Step 900
900
#34444C
oklch(37.6% 0.025 229.8)
-
Step 950
950
#1F282D
oklch(27% 0.016 232.4)
#617F8E 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) | #787E8F | 0.031 |
| Deuteranopia (no green cones) | #71788E | 0.028 |
| Tritanopia (no blue cones) | #538384 | 0.028 |
| Achromatopsia (no color) | #7B7B7B | 0.042 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #617F8E
#617F8E
oklch(57.9% 0.041 230)
- #8F7364
#8F7364
oklch(57.8% 0.042 49.7)
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 #617F8E, 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 0.017
- Slate Gray #708090 ΔE 0.021
- Steel Grey #6F828A ΔE 0.022
- Steel #738595 ΔE 0.032
- Battleship Gray #6C757D ΔE 0.033
- Stormy Blue #507B9C ΔE 0.034
- Cerulean #457B9D ΔE 0.042
Use #617F8E 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.