#678FAF
Closest named color: Silver Lake Blue (#778DA9). oklch(63.3% 0.066 243.2), rgb(103, 143, 175).
Aa
Black text reads best on this color (6.12:1).
About this color
#678FAF is a medium-light, muted blue. In OKLCH its lightness is 63%, its chroma 0.066 and its hue 243°. Its hue sits on the cool side of the wheel. The nearest named color is Silver Lake Blue (#778DA9), ΔE 0.020 away. Black text reads best on it, at 6.12:1.
| Hue family | Blues |
| Lightness | medium-light (63%) |
| Chroma | muted (0.066) |
| Temperature | cool |
| Nearest name | Silver Lake Blue (#778DA9) |
| Black text | 6.12:1 |
| White text | 3.42:1 |
Values
| HEX | #678FAF |
| RGB | rgb(103, 143, 175) |
| HSL | hsl(207, 31%, 55%) |
| OKLCH | oklch(63.3% 0.066 243.2) |
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 #678FAF | 3.42:1 | AA large text | Lc -67.2 | Content text, not long reading |
| Black text on #678FAF | 6.12:1 | AA | Lc 42.3 | Non-text elements, placeholder text |
| #678FAF text on white | 3.42:1 | AA large text | Lc 61.7 | Content text, not long reading |
| #678FAF text on black | 6.12:1 | AA | Lc -39.9 | 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
#F3F6F8
oklch(97.1% 0.004 236.5)
-
Step 100
100
#E5EBF0
oklch(93.7% 0.009 242.8)
-
Step 200
200
#D0DBE4
oklch(88.6% 0.017 242.5)
-
Step 300
300
#B0C4D4
oklch(81% 0.031 242.1)
-
Step 400
400
#85A5BF
oklch(70.7% 0.052 243)
-
Step 500
500 (this color)
#678FAF
oklch(63.3% 0.066 243.2)
-
Step 600
600
#4D789A
oklch(55.5% 0.071 243.4)
-
Step 700
700
#3E6584
oklch(49.1% 0.067 243.7)
-
Step 800
800
#33536B
oklch(42.8% 0.055 242.1)
-
Step 900
900
#2D4457
oklch(37.6% 0.044 244.2)
-
Step 950
950
#1B2833
oklch(27% 0.027 244.6)
#678FAF 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) | #828FB1 | 0.034 |
| Deuteranopia (no green cones) | #7887AE | 0.029 |
| Tritanopia (no blue cones) | #4C9799 | 0.055 |
| Achromatopsia (no color) | #8B8B8B | 0.066 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #678FAF
#678FAF
oklch(63.3% 0.066 243.2)
- #A78260
#A78260
oklch(63.4% 0.066 63.8)
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 #678FAF, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Silver Lake Blue #778DA9 ΔE 0.020
- Blue Grey #758DA3 ΔE 0.023
- Faded Blue #658CBB ΔE 0.023
- Dusty Blue #5A86AD ΔE 0.031
- Light Slate Gray #778899 ΔE 0.036
- Off Blue #5684AE ΔE 0.039
- Steel #738595 ΔE 0.042
- Lavender Gray #7E7F9A ΔE 0.051
Use #678FAF 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.