#688AC3
Closest named color: Faded Blue (#658CBB). oklch(63.1% 0.095 260.4), rgb(104, 138, 195).
Aa
Black text reads best on this color (6.01:1).
About this color
#688AC3 is a medium-light, moderately saturated blue. In OKLCH its lightness is 63%, its chroma 0.095 and its hue 260°. Its hue sits on the cool side of the wheel. The nearest named color is Faded Blue (#658CBB), ΔE 0.015 away. Black text reads best on it, at 6.01:1.
| Hue family | Blues |
| Lightness | medium-light (63%) |
| Chroma | moderately saturated (0.095) |
| Temperature | cool |
| Nearest name | Faded Blue (#658CBB) |
| Black text | 6.01:1 |
| White text | 3.49:1 |
Values
| HEX | #688AC3 |
| RGB | rgb(104, 138, 195) |
| HSL | hsl(218, 43%, 59%) |
| OKLCH | oklch(63.1% 0.095 260.4) |
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 #688AC3 | 3.49:1 | AA large text | Lc -67.9 | Content text, not long reading |
| Black text on #688AC3 | 6.01:1 | AA | Lc 41.7 | Non-text elements, placeholder text |
| #688AC3 text on white | 3.49:1 | AA large text | Lc 62.4 | Content text, not long reading |
| #688AC3 text on black | 6.01:1 | AA | Lc -39.3 | 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
#E5EAF3
oklch(93.6% 0.013 262.4)
-
Step 200
200
#D0DAEB
oklch(88.6% 0.026 261.1)
-
Step 300
300
#B0C2DF
oklch(81% 0.046 259.9)
-
Step 400
400
#86A2CF
oklch(70.8% 0.073 259.8)
-
Step 500
500 (this color)
#688AC3
oklch(63.1% 0.095 260.4)
-
Step 600
600
#4F73AF
oklch(55.6% 0.103 260.2)
-
Step 700
700
#406097
oklch(49.1% 0.096 260.7)
-
Step 800
800
#354F7A
oklch(42.7% 0.079 260)
-
Step 900
900
#2E4262
oklch(37.8% 0.061 259.5)
-
Step 950
950
#1B273A
oklch(27.1% 0.039 259.4)
#688AC3 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) | #758EC5 | 0.021 |
| Deuteranopia (no green cones) | #6A85C2 | 0.014 |
| Tritanopia (no blue cones) | #43969E | 0.084 |
| Achromatopsia (no color) | #898989 | 0.095 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #688AC3
#688AC3
oklch(63.1% 0.095 260.4)
- #A78342
#A78342
oklch(63.1% 0.094 80.4)
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 #688AC3, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Faded Blue #658CBB ΔE 0.015
- Dusty Blue #5A86AD ΔE 0.039
- Off Blue #5684AE ΔE 0.042
- Cool Blue #4984B8 ΔE 0.043
- Silver Lake Blue #778DA9 ΔE 0.046
- Steel Blue #4682B4 ΔE 0.050
- Blue Grey #758DA3 ΔE 0.054
- Dark Sky Blue #448EE4 ΔE 0.057
Use #688AC3 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.