#618B8F
Closest named color: Steel Grey (#6F828A). oklch(60.8% 0.046 203.5), rgb(97, 139, 143).
Aa
Black text reads best on this color (5.59:1).
About this color
#618B8F is a medium-dark, muted teal or cyan. In OKLCH its lightness is 61%, its chroma 0.046 and its hue 203°. Its hue sits on the cool side of the wheel. The nearest named color is Steel Grey (#6F828A), ΔE 0.028 away. Black text reads best on it, at 5.59:1.
| Hue family | Teals and cyans |
| Lightness | medium-dark (61%) |
| Chroma | muted (0.046) |
| Temperature | cool |
| Nearest name | Steel Grey (#6F828A) |
| Black text | 5.59:1 |
| White text | 3.75:1 |
Values
| HEX | #618B8F |
| RGB | rgb(97, 139, 143) |
| HSL | hsl(185, 19%, 47%) |
| OKLCH | oklch(60.8% 0.046 203.5) |
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 #618B8F | 3.75:1 | AA large text | Lc -70.5 | Content text, not long reading |
| Black text on #618B8F | 5.59:1 | AA | Lc 39.1 | Non-text elements, placeholder text |
| #618B8F text on white | 3.75:1 | AA large text | Lc 65.0 | Content text, not long reading |
| #618B8F text on black | 5.59:1 | AA | Lc -36.6 | 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 500.
-
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
#D0DCDD
oklch(88.6% 0.013 202.9)
-
Step 300
300
#B0C5C7
oklch(80.8% 0.023 203.7)
-
Step 400
400
#87A8AB
oklch(70.8% 0.036 203.2)
-
Step 500
500 (this color)
#618B8F
oklch(60.8% 0.046 203.5)
-
Step 600
600
#4E7C81
oklch(55.5% 0.051 204.5)
-
Step 700
700
#3F696D
oklch(49.2% 0.047 203.5)
-
Step 800
800
#345559
oklch(42.6% 0.039 205.5)
-
Step 900
900
#2E4649
oklch(37.6% 0.03 205.8)
-
Step 950
950
#1B292B
oklch(26.9% 0.019 207.1)
#618B8F 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) | #85878F | 0.047 |
| Deuteranopia (no green cones) | #7D818F | 0.044 |
| Tritanopia (no blue cones) | #508E8C | 0.021 |
| Achromatopsia (no color) | #848484 | 0.047 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #618B8F
#618B8F
oklch(60.8% 0.046 203.5)
- #9D7875
#9D7875
oklch(60.8% 0.047 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 #618B8F, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Steel Grey #6F828A ΔE 0.028
- Steel #738595 ΔE 0.031
- Dusty Teal #4C9085 ΔE 0.033
- Light Slate Gray #778899 ΔE 0.035
- Slate Gray #708090 ΔE 0.036
- Grey Blue #647D8E ΔE 0.041
- Blue Grey #758DA3 ΔE 0.041
- Battleship Grey #6B7C85 ΔE 0.042
Use #618B8F 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.