#678C9F
Closest named color: Blue Grey (#758DA3). oklch(61.9% 0.05 230.9), rgb(103, 140, 159).
Aa
Black text reads best on this color (5.82:1).
About this color
#678C9F is a medium-dark, muted blue. In OKLCH its lightness is 62%, its chroma 0.050 and its hue 231°. Its hue sits on the cool side of the wheel. The nearest named color is Blue Grey (#758DA3), ΔE 0.019 away. Black text reads best on it, at 5.82:1.
| Hue family | Blues |
| Lightness | medium-dark (62%) |
| Chroma | muted (0.050) |
| Temperature | cool |
| Nearest name | Blue Grey (#758DA3) |
| Black text | 5.82:1 |
| White text | 3.60:1 |
Values
| HEX | #678C9F |
| RGB | rgb(103, 140, 159) |
| HSL | hsl(200, 23%, 51%) |
| OKLCH | oklch(61.9% 0.05 230.9) |
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 #678C9F | 3.60:1 | AA large text | Lc -69.1 | Content text, not long reading |
| Black text on #678C9F | 5.82:1 | AA | Lc 40.5 | Non-text elements, placeholder text |
| #678C9F text on white | 3.60:1 | AA large text | Lc 63.6 | Content text, not long reading |
| #678C9F text on black | 5.82:1 | AA | Lc -38.1 | 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
#D1DBE1
oklch(88.6% 0.014 233.8)
-
Step 300
300
#B1C4CE
oklch(80.9% 0.025 230.5)
-
Step 400
400
#88A6B5
oklch(70.8% 0.04 229.6)
-
Step 500
500 (this color)
#678C9F
oklch(61.9% 0.05 230.9)
-
Step 600
600
#51798E
oklch(55.5% 0.055 232)
-
Step 700
700
#426678
oklch(49% 0.05 230.8)
-
Step 800
800
#375362
oklch(42.6% 0.042 232.4)
-
Step 900
900
#304550
oklch(37.7% 0.032 231.5)
-
Step 950
950
#1C282F
oklch(26.9% 0.021 234.2)
#678C9F 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) | #838AA0 | 0.036 |
| Deuteranopia (no green cones) | #7B849F | 0.033 |
| Tritanopia (no blue cones) | #549192 | 0.036 |
| Achromatopsia (no color) | #878787 | 0.050 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #678C9F
#678C9F
oklch(61.9% 0.05 230.9)
- #9F7E6B
#9F7E6B
oklch(62% 0.05 51.4)
Analogous
Neighbouring hues, 30° either side.
Split complementary
The two hues beside the complement (150° and 210°).
Triadic
Three hues spaced 120° apart.
Palettes and gradients that use #678C9F
These curated palettes and gradients contain exactly #678C9F. Open one to see the full color scheme around it.
Gradients
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Blue Grey #758DA3 ΔE 0.019
- Light Slate Gray #778899 ΔE 0.022
- Steel #738595 ΔE 0.024
- Silver Lake Blue #778DA9 ΔE 0.026
- Dusty Blue #5A86AD ΔE 0.035
- Slate Gray #708090 ΔE 0.035
- Steel Grey #6F828A ΔE 0.036
- Off Blue #5684AE ΔE 0.043
Use #678C9F 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.