#678DCF
Closest named color: Faded Blue (#658CBB). oklch(64.3% 0.108 261), rgb(103, 141, 207).
Aa
Black text reads best on this color (6.28:1).
About this color
#678DCF is a medium-light, moderately saturated blue. In OKLCH its lightness is 64%, its chroma 0.108 and its hue 261°. Its hue sits on the cool side of the wheel. The nearest named color is Faded Blue (#658CBB), ΔE 0.031 away. Black text reads best on it, at 6.28:1.
| Hue family | Blues |
| Lightness | medium-light (64%) |
| Chroma | moderately saturated (0.108) |
| Temperature | cool |
| Nearest name | Faded Blue (#658CBB) |
| Black text | 6.28:1 |
| White text | 3.33:1 |
Values
| HEX | #678DCF |
| RGB | rgb(103, 141, 207) |
| HSL | hsl(218, 52%, 61%) |
| OKLCH | oklch(64.3% 0.108 261) |
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 #678DCF | 3.33:1 | AA large text | Lc -66.2 | Content text, not long reading |
| Black text on #678DCF | 6.28:1 | AA | Lc 43.4 | Non-text elements, placeholder text |
| #678DCF text on white | 3.33:1 | AA large text | Lc 60.7 | Content text, not long reading |
| #678DCF text on black | 6.28:1 | AA | Lc -41.0 | 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
#F3F6FA
oklch(97.2% 0.006 255.5)
-
Step 100
100
#E4EAF4
oklch(93.5% 0.015 260.7)
-
Step 200
200
#CEDAED
oklch(88.5% 0.029 259.6)
-
Step 300
300
#AEC2E4
oklch(81% 0.053 261)
-
Step 400
400
#83A1D6
oklch(70.7% 0.085 261.5)
-
Step 500
500 (this color)
#678DCF
oklch(64.3% 0.108 261)
-
Step 600
600
#4A72B8
oklch(55.6% 0.118 260.9)
-
Step 700
700
#3C5F9E
oklch(49% 0.109 261.3)
-
Step 800
800
#314E80
oklch(42.6% 0.091 260.7)
-
Step 900
900
#2C4167
oklch(37.7% 0.071 261.6)
-
Step 950
950
#1A263C
oklch(26.9% 0.045 261.9)
#678DCF 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) | #7492D2 | 0.022 |
| Deuteranopia (no green cones) | #6788CE | 0.014 |
| Tritanopia (no blue cones) | #379BA5 | 0.096 |
| Achromatopsia (no color) | #8D8D8D | 0.108 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #678DCF
#678DCF
oklch(64.3% 0.108 261)
- #AF8636
#AF8636
oklch(64.4% 0.109 81.2)
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 #678DCF, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Faded Blue #658CBB ΔE 0.031
- Dark Sky Blue #448EE4 ΔE 0.044
- Cornflower Blue #6495ED ΔE 0.046
- Soft Blue #6488EA ΔE 0.046
- Chefchaouen Blue #4895EF ΔE 0.053
- Cool Blue #4984B8 ΔE 0.054
- Dusty Blue #5A86AD ΔE 0.056
- Off Blue #5684AE ΔE 0.058
Use #678DCF 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.