#678DF4
Closest named color: Soft Blue (#6488EA). oklch(66.4% 0.159 266.8), rgb(103, 141, 244).
Aa
Black text reads best on this color (6.69:1).
About this color
#678DF4 is a medium-light, vivid blue. In OKLCH its lightness is 66%, its chroma 0.159 and its hue 267°. Its hue sits on the cool side of the wheel. The nearest named color is Soft Blue (#6488EA), ΔE 0.019 away. Black text reads best on it, at 6.69:1.
| Hue family | Blues |
| Lightness | medium-light (66%) |
| Chroma | vivid (0.159) |
| Temperature | cool |
| Nearest name | Soft Blue (#6488EA) |
| Black text | 6.69:1 |
| White text | 3.13:1 |
Values
| HEX | #678DF4 |
| RGB | rgb(103, 141, 244) |
| HSL | hsl(224, 87%, 68%) |
| OKLCH | oklch(66.4% 0.159 266.8) |
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 #678DF4 | 3.13:1 | AA large text | Lc -63.6 | Content text, not long reading |
| Black text on #678DF4 | 6.69:1 | AA | Lc 45.8 | Large or bold text, headings |
| #678DF4 text on white | 3.13:1 | AA large text | Lc 58.2 | Large or bold text, headings |
| #678DF4 text on black | 6.69:1 | AA | Lc -43.5 | 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
#F2F5FD
oklch(97% 0.011 269.6)
-
Step 100
100
#E3EAFA
oklch(93.6% 0.023 266.9)
-
Step 200
200
#CCD9F7
oklch(88.5% 0.044 266.9)
-
Step 300
300
#AAC0F4
oklch(80.9% 0.078 266.8)
-
Step 400
400
#7D9DEE
oklch(70.6% 0.124 266.8)
-
Step 500
500 (this color)
#678DF4
oklch(66.4% 0.159 266.8)
-
Step 600
600
#456AD7
oklch(55.6% 0.172 266.6)
-
Step 700
700
#3757BA
oklch(49% 0.161 266.8)
-
Step 800
800
#2E4897
oklch(42.7% 0.133 266.9)
-
Step 900
900
#283D78
oklch(37.6% 0.104 266.7)
-
Step 950
950
#182446
oklch(26.9% 0.065 267.3)
#678DF4 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) | #5F98F8 | 0.028 |
| Deuteranopia (no green cones) | #4C8BF2 | 0.029 |
| Tritanopia (no blue cones) | #00A4B5 | 0.140 |
| Achromatopsia (no color) | #919191 | 0.159 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #678DF4
#678DF4
oklch(66.4% 0.159 266.8)
- #B78C00
#B78C00
oklch(66.3% 0.136 86.7)
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 #678DF4, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Soft Blue #6488EA ΔE 0.019
- Cornflower Blue #6495ED ΔE 0.025
- Chefchaouen Blue #4895EF ΔE 0.035
- Dark Sky Blue #448EE4 ΔE 0.043
- Lavender Blue #8B88F8 ΔE 0.046
- Cornflower #6A79F7 ΔE 0.051
- Dodger Blue #1E90FF ΔE 0.053
- Perrywinkle #8F8CE7 ΔE 0.053
Use #678DF4 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.