#687DEF
Closest named color: Cornflower (#6A79F7). oklch(63% 0.171 272.7), rgb(104, 125, 239).
Aa
Black text reads best on this color (5.76:1).
About this color
#687DEF is a medium-light, vivid blue. In OKLCH its lightness is 63%, its chroma 0.171 and its hue 273°. Its hue sits on the cool side of the wheel. The nearest named color is Cornflower (#6A79F7), ΔE 0.016 away. Black text reads best on it, at 5.76:1.
| Hue family | Blues |
| Lightness | medium-light (63%) |
| Chroma | vivid (0.171) |
| Temperature | cool |
| Nearest name | Cornflower (#6A79F7) |
| Black text | 5.76:1 |
| White text | 3.64:1 |
Values
| HEX | #687DEF |
| RGB | rgb(104, 125, 239) |
| HSL | hsl(231, 81%, 67%) |
| OKLCH | oklch(63% 0.171 272.7) |
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 #687DEF | 3.64:1 | AA large text | Lc -69.2 | Content text, not long reading |
| Black text on #687DEF | 5.76:1 | AA | Lc 40.3 | Non-text elements, placeholder text |
| #687DEF text on white | 3.64:1 | AA large text | Lc 63.7 | Content text, not long reading |
| #687DEF text on black | 5.76:1 | AA | Lc -37.9 | 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
#F3F5FD
oklch(97.1% 0.011 274.9)
-
Step 100
100
#E4E9FB
oklch(93.6% 0.025 273.5)
-
Step 200
200
#CED8F9
oklch(88.5% 0.047 272.1)
-
Step 300
300
#AEBEF7
oklch(80.9% 0.083 272.3)
-
Step 400
400
#859AF4
oklch(70.8% 0.134 272.6)
-
Step 500
500 (this color)
#687DEF
oklch(63% 0.171 272.7)
-
Step 600
600
#5264DE
oklch(55.7% 0.186 272.6)
-
Step 700
700
#4352C1
oklch(49.2% 0.173 272.5)
-
Step 800
800
#37449C
oklch(42.8% 0.143 272.5)
-
Step 900
900
#2F3A7C
oklch(37.7% 0.112 272.8)
-
Step 950
950
#1B2349
oklch(27.1% 0.071 272)
#687DEF 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) | #458CF3 | 0.047 |
| Deuteranopia (no green cones) | #3180ED | 0.051 |
| Tritanopia (no blue cones) | #0C97AB | 0.152 |
| Achromatopsia (no color) | #868686 | 0.172 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #687DEF
#687DEF
oklch(63% 0.171 272.7)
- #A48600
#A48600
oklch(63% 0.129 93)
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 #687DEF, closest first.
No curated palette has a color within ΔE 0.04 of #687DEF.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cornflower #6A79F7 ΔE 0.016
- Soft Blue #6488EA ΔE 0.030
- Medium Slate Blue #7B68EE ΔE 0.053
- Dark Sky Blue #448EE4 ΔE 0.058
- Lavender Blue #8B88F8 ΔE 0.058
- Periwinkle #8E82FE ΔE 0.059
- Cornflower Blue #6495ED ΔE 0.062
- Clear Blue #247AFD ΔE 0.064
Use #687DEF 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.