#618D9F
Closest named color: Blue Grey (#758DA3). oklch(61.8% 0.055 225.5), rgb(97, 141, 159).
Aa
Black text reads best on this color (5.81:1).
About this color
#618D9F is a medium-dark, muted teal or cyan. In OKLCH its lightness is 62%, its chroma 0.055 and its hue 225°. Its hue sits on the cool side of the wheel. The nearest named color is Blue Grey (#758DA3), ΔE 0.026 away. Black text reads best on it, at 5.81:1.
| Hue family | Teals and cyans |
| Lightness | medium-dark (62%) |
| Chroma | muted (0.055) |
| Temperature | cool |
| Nearest name | Blue Grey (#758DA3) |
| Black text | 5.81:1 |
| White text | 3.60:1 |
Values
| HEX | #618D9F |
| RGB | rgb(97, 141, 159) |
| HSL | hsl(197, 24%, 50%) |
| OKLCH | oklch(61.8% 0.055 225.5) |
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 #618D9F | 3.60:1 | AA large text | Lc -69.1 | Content text, not long reading |
| Black text on #618D9F | 5.81:1 | AA | Lc 40.5 | Non-text elements, placeholder text |
| #618D9F text on white | 3.60:1 | AA large text | Lc 63.6 | Content text, not long reading |
| #618D9F text on black | 5.81:1 | AA | Lc -38.0 | 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 500.
-
Step 50
50
#F3F6F7
oklch(97.1% 0.003 219.5)
-
Step 100
100
#E5EBEE
oklch(93.6% 0.008 228.9)
-
Step 200
200
#CFDBE1
oklch(88.4% 0.015 229)
-
Step 300
300
#AFC5CE
oklch(81% 0.027 224.3)
-
Step 400
400
#84A7B5
oklch(70.7% 0.043 224.3)
-
Step 500
500 (this color)
#618D9F
oklch(61.8% 0.055 225.5)
-
Step 600
600
#4B7B8E
oklch(55.6% 0.06 225.2)
-
Step 700
700
#3C6879
oklch(49.2% 0.056 224.9)
-
Step 800
800
#325462
oklch(42.6% 0.046 226.2)
-
Step 900
900
#2C4650
oklch(37.7% 0.036 224.2)
-
Step 950
950
#1A292F
oklch(27% 0.023 224.8)
#618D9F 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) | #838BA0 | 0.043 |
| Deuteranopia (no green cones) | #7A849F | 0.038 |
| Tritanopia (no blue cones) | #4A9393 | 0.037 |
| Achromatopsia (no color) | #878787 | 0.055 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #618D9F
#618D9F
oklch(61.8% 0.055 225.5)
- #A27C6A
#A27C6A
oklch(61.8% 0.054 46.5)
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 #618D9F, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Blue Grey #758DA3 ΔE 0.026
- Light Slate Gray #778899 ΔE 0.028
- Steel #738595 ΔE 0.029
- Silver Lake Blue #778DA9 ΔE 0.032
- Dusty Blue #5A86AD ΔE 0.035
- Steel Grey #6F828A ΔE 0.038
- Slate Gray #708090 ΔE 0.039
- Off Blue #5684AE ΔE 0.042
Use #618D9F 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.