#678FCC
Closest named color: Faded Blue (#658CBB). oklch(64.6% 0.102 258.6), rgb(103, 143, 204).
Aa
Black text reads best on this color (6.37:1).
About this color
#678FCC is a medium-light, moderately saturated blue. In OKLCH its lightness is 65%, its chroma 0.102 and its hue 259°. Its hue sits on the cool side of the wheel. The nearest named color is Faded Blue (#658CBB), ΔE 0.026 away. Black text reads best on it, at 6.37:1.
| Hue family | Blues |
| Lightness | medium-light (65%) |
| Chroma | moderately saturated (0.102) |
| Temperature | cool |
| Nearest name | Faded Blue (#658CBB) |
| Black text | 6.37:1 |
| White text | 3.29:1 |
Values
| HEX | #678FCC |
| RGB | rgb(103, 143, 204) |
| HSL | hsl(216, 50%, 60%) |
| OKLCH | oklch(64.6% 0.102 258.6) |
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 #678FCC | 3.29:1 | AA large text | Lc -65.6 | Content text, not long reading |
| Black text on #678FCC | 6.37:1 | AA | Lc 43.9 | Non-text elements, placeholder text |
| #678FCC text on white | 3.29:1 | AA large text | Lc 60.2 | Content text, not long reading |
| #678FCC text on black | 6.37:1 | AA | Lc -41.5 | 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
#F3F6FA
oklch(97.2% 0.006 255.5)
-
Step 100
100
#E4EAF4
oklch(93.5% 0.015 260.7)
-
Step 200
200
#CEDAEC
oklch(88.5% 0.028 258.4)
-
Step 300
300
#ADC2E1
oklch(80.8% 0.05 258)
-
Step 400
400
#82A2D3
oklch(70.7% 0.081 258.7)
-
Step 500
500 (this color)
#678FCC
oklch(64.6% 0.102 258.6)
-
Step 600
600
#4973B4
oklch(55.5% 0.112 258.8)
-
Step 700
700
#3A619B
oklch(49.2% 0.104 258.1)
-
Step 800
800
#314F7D
oklch(42.7% 0.085 258.7)
-
Step 900
900
#2B4265
oklch(37.7% 0.067 258.5)
-
Step 950
950
#19273B
oklch(27% 0.042 257.3)
#678FCC 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) | #7793CF | 0.024 |
| Deuteranopia (no green cones) | #6C89CB | 0.016 |
| Tritanopia (no blue cones) | #399CA5 | 0.090 |
| Achromatopsia (no color) | #8E8E8E | 0.102 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #678FCC
#678FCC
oklch(64.6% 0.102 258.6)
- #B0863F
#B0863F
oklch(64.7% 0.102 78.3)
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 #678FCC, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Faded Blue #658CBB ΔE 0.026
- Dark Sky Blue #448EE4 ΔE 0.048
- Cornflower Blue #6495ED ΔE 0.049
- Dusty Blue #5A86AD ΔE 0.053
- Soft Blue #6488EA ΔE 0.053
- Silver Lake Blue #778DA9 ΔE 0.054
- Cool Blue #4984B8 ΔE 0.054
- Off Blue #5684AE ΔE 0.056
Use #678FCC 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.