#678F9B
Closest named color: Blue Grey (#758DA3). oklch(62.5% 0.048 218.3), rgb(103, 143, 155).
Aa
Black text reads best on this color (5.97:1).
About this color
#678F9B is a medium-light, muted teal or cyan. In OKLCH its lightness is 62%, its chroma 0.048 and its hue 218°. Its hue sits on the cool side of the wheel. The nearest named color is Blue Grey (#758DA3), ΔE 0.024 away. Black text reads best on it, at 5.97:1.
| Hue family | Teals and cyans |
| Lightness | medium-light (62%) |
| Chroma | muted (0.048) |
| Temperature | cool |
| Nearest name | Blue Grey (#758DA3) |
| Black text | 5.97:1 |
| White text | 3.51:1 |
Values
| HEX | #678F9B |
| RGB | rgb(103, 143, 155) |
| HSL | hsl(194, 21%, 51%) |
| OKLCH | oklch(62.5% 0.048 218.3) |
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 #678F9B | 3.51:1 | AA large text | Lc -68.1 | Content text, not long reading |
| Black text on #678F9B | 5.97:1 | AA | Lc 41.4 | Non-text elements, placeholder text |
| #678F9B text on white | 3.51:1 | AA large text | Lc 62.7 | Content text, not long reading |
| #678F9B text on black | 5.97:1 | AA | Lc -39.0 | 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
#E5EBED
oklch(93.6% 0.007 219.6)
-
Step 200
200
#D0DBDF
oklch(88.4% 0.013 221.4)
-
Step 300
300
#B1C5CB
oklch(81% 0.023 217.7)
-
Step 400
400
#87A7B0
oklch(70.7% 0.038 216.7)
-
Step 500
500 (this color)
#678F9B
oklch(62.5% 0.048 218.3)
-
Step 600
600
#507B88
oklch(55.7% 0.051 218.9)
-
Step 700
700
#406873
oklch(49.2% 0.048 217.1)
-
Step 800
800
#35545E
oklch(42.6% 0.04 220.3)
-
Step 900
900
#2F464D
oklch(37.8% 0.031 218.7)
-
Step 950
950
#1C292D
oklch(27.1% 0.019 218.7)
#678F9B 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) | #878C9C | 0.042 |
| Deuteranopia (no green cones) | #7F869B | 0.038 |
| Tritanopia (no blue cones) | #559393 | 0.028 |
| Achromatopsia (no color) | #898989 | 0.048 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #678F9B
#678F9B
oklch(62.5% 0.048 218.3)
- #A27E73
#A27E73
oklch(62.5% 0.048 37.7)
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 #678F9B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Blue Grey #758DA3 ΔE 0.024
- Light Slate Gray #778899 ΔE 0.026
- Steel #738595 ΔE 0.029
- Silver Lake Blue #778DA9 ΔE 0.032
- Steel Grey #6F828A ΔE 0.038
- Slate Gray #708090 ΔE 0.041
- Cadet Blue #5F9EA0 ΔE 0.042
- Dusty Blue #5A86AD ΔE 0.046
Use #678F9B 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.