#678FCB
Closest named color: Faded Blue (#658CBB). oklch(64.6% 0.101 258.3), rgb(103, 143, 203).
Aa
Black text reads best on this color (6.36:1).
About this color
#678FCB is a medium-light, moderately saturated blue. In OKLCH its lightness is 65%, its chroma 0.101 and its hue 258°. Its hue sits on the cool side of the wheel. The nearest named color is Faded Blue (#658CBB), ΔE 0.024 away. Black text reads best on it, at 6.36:1.
| Hue family | Blues |
| Lightness | medium-light (65%) |
| Chroma | moderately saturated (0.101) |
| Temperature | cool |
| Nearest name | Faded Blue (#658CBB) |
| Black text | 6.36:1 |
| White text | 3.29:1 |
Values
| HEX | #678FCB |
| RGB | rgb(103, 143, 203) |
| HSL | hsl(216, 49%, 60%) |
| OKLCH | oklch(64.6% 0.101 258.3) |
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 #678FCB | 3.29:1 | AA large text | Lc -65.7 | Content text, not long reading |
| Black text on #678FCB | 6.36:1 | AA | Lc 43.8 | Non-text elements, placeholder text |
| #678FCB text on white | 3.29:1 | AA large text | Lc 60.2 | Content text, not long reading |
| #678FCB text on black | 6.36:1 | 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
#82A2D2
oklch(70.6% 0.079 258.3)
-
Step 500
500 (this color)
#678FCB
oklch(64.6% 0.101 258.3)
-
Step 600
600
#4974B3
oklch(55.7% 0.11 257.9)
-
Step 700
700
#3B619A
oklch(49.2% 0.102 258.3)
-
Step 800
800
#314F7D
oklch(42.7% 0.085 258.7)
-
Step 900
900
#2B4264
oklch(37.7% 0.065 258)
-
Step 950
950
#1A273B
oklch(27.1% 0.042 258.8)
#678FCB 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) | #7893CE | 0.025 |
| Deuteranopia (no green cones) | #6C89CA | 0.016 |
| Tritanopia (no blue cones) | #3A9CA4 | 0.090 |
| Achromatopsia (no color) | #8D8D8D | 0.101 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #678FCB
#678FCB
oklch(64.6% 0.101 258.3)
- #AF8640
#AF8640
oklch(64.6% 0.101 78.7)
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 #678FCB, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Faded Blue #658CBB ΔE 0.024
- Dark Sky Blue #448EE4 ΔE 0.049
- Cornflower Blue #6495ED ΔE 0.050
- Dusty Blue #5A86AD ΔE 0.052
- Silver Lake Blue #778DA9 ΔE 0.053
- Cool Blue #4984B8 ΔE 0.053
- Soft Blue #6488EA ΔE 0.055
- Off Blue #5684AE ΔE 0.055
Use #678FCB 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.