#678DB9
Closest named color: Faded Blue (#658CBB). oklch(63.3% 0.079 252.6), rgb(103, 141, 185).
Aa
Black text reads best on this color (6.08:1).
About this color
#678DB9 is a medium-light, moderately saturated blue. In OKLCH its lightness is 63%, its chroma 0.079 and its hue 253°. Its hue sits on the cool side of the wheel. The nearest named color is Faded Blue (#658CBB), ΔE 0.005 away. Black text reads best on it, at 6.08:1.
| Hue family | Blues |
| Lightness | medium-light (63%) |
| Chroma | moderately saturated (0.079) |
| Temperature | cool |
| Nearest name | Faded Blue (#658CBB) |
| Black text | 6.08:1 |
| White text | 3.44:1 |
Values
| HEX | #678DB9 |
| RGB | rgb(103, 141, 185) |
| HSL | hsl(212, 37%, 56%) |
| OKLCH | oklch(63.3% 0.079 252.6) |
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 #678DB9 | 3.44:1 | AA large text | Lc -67.4 | Content text, not long reading |
| Black text on #678DB9 | 6.08:1 | AA | Lc 42.1 | Non-text elements, placeholder text |
| #678DB9 text on white | 3.44:1 | AA large text | Lc 62.0 | Content text, not long reading |
| #678DB9 text on black | 6.08:1 | AA | Lc -39.7 | 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
#F3F6F9
oklch(97.2% 0.005 247.9)
-
Step 100
100
#E5EAF1
oklch(93.5% 0.011 256.7)
-
Step 200
200
#CFDAE7
oklch(88.4% 0.022 252.5)
-
Step 300
300
#AFC3DA
oklch(80.9% 0.039 252)
-
Step 400
400
#85A3C7
oklch(70.6% 0.063 253.3)
-
Step 500
500 (this color)
#678DB9
oklch(63.3% 0.079 252.6)
-
Step 600
600
#4D76A4
oklch(55.6% 0.086 252.2)
-
Step 700
700
#3E638D
oklch(49.1% 0.08 252.6)
-
Step 800
800
#345172
oklch(42.7% 0.065 252.5)
-
Step 900
900
#2D435C
oklch(37.6% 0.051 252.3)
-
Step 950
950
#1B2736
oklch(26.9% 0.033 254.4)
#678DB9 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) | #7C8FBB | 0.028 |
| Deuteranopia (no green cones) | #7286B8 | 0.022 |
| Tritanopia (no blue cones) | #47979C | 0.069 |
| Achromatopsia (no color) | #8A8A8A | 0.079 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #678DB9
#678DB9
oklch(63.3% 0.079 252.6)
- #A88253
#A88253
oklch(63.2% 0.079 71.5)
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 #678DB9, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Faded Blue #658CBB ΔE 0.005
- Silver Lake Blue #778DA9 ΔE 0.030
- Dusty Blue #5A86AD ΔE 0.030
- Off Blue #5684AE ΔE 0.036
- Blue Grey #758DA3 ΔE 0.037
- Cool Blue #4984B8 ΔE 0.044
- Light Slate Gray #778899 ΔE 0.049
- Steel Blue #4682B4 ΔE 0.050
Use #678DB9 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.