#819FFB
Closest named color: Periwinkle Blue (#8F99FB). oklch(71.9% 0.139 269.1), rgb(129, 159, 251).
Aa
Black text reads best on this color (8.28:1).
About this color
#819FFB is a medium-light, moderately saturated blue. In OKLCH its lightness is 72%, its chroma 0.139 and its hue 269°. Its hue sits on the cool side of the wheel. The nearest named color is Periwinkle Blue (#8F99FB), ΔE 0.022 away. Black text reads best on it, at 8.28:1.
| Hue family | Blues |
| Lightness | medium-light (72%) |
| Chroma | moderately saturated (0.139) |
| Temperature | cool |
| Nearest name | Periwinkle Blue (#8F99FB) |
| Black text | 8.28:1 |
| White text | 2.53:1 |
Values
| HEX | #819FFB |
| RGB | rgb(129, 159, 251) |
| HSL | hsl(225, 94%, 75%) |
| OKLCH | oklch(71.9% 0.139 269.1) |
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 #819FFB | 2.53:1 | Fails | Lc -54.6 | Large or bold text, headings |
| Black text on #819FFB | 8.28:1 | AAA | Lc 54.5 | Large or bold text, headings |
| #819FFB text on white | 2.53:1 | Fails | Lc 49.5 | Large or bold text, headings |
| #819FFB text on black | 8.28:1 | AAA | Lc -52.4 | Large or bold text, headings |
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 400.
-
Step 50
50
#F2F5FE
oklch(97% 0.012 271.3)
-
Step 100
100
#E3EAFB
oklch(93.7% 0.024 267.9)
-
Step 200
200
#CCD9FA
oklch(88.6% 0.048 268.4)
-
Step 300
300
#AABFF9
oklch(80.9% 0.086 269)
-
Step 400
400 (this color)
#819FFB
oklch(71.9% 0.139 269.1)
-
Step 500
500
#5F7FF3
oklch(63.1% 0.177 269.2)
-
Step 600
600
#4765E2
oklch(55.6% 0.193 269)
-
Step 700
700
#3953C4
oklch(49.1% 0.179 269)
-
Step 800
800
#2F459F
oklch(42.8% 0.148 268.9)
-
Step 900
900
#293B7E
oklch(37.7% 0.115 269)
-
Step 950
950
#18234A
oklch(27% 0.074 269.2)
#819FFB 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) | #7CA8FF | 0.023 |
| Deuteranopia (no green cones) | #6F9EF9 | 0.021 |
| Tritanopia (no blue cones) | #4EB2C1 | 0.124 |
| Achromatopsia (no color) | #A3A3A3 | 0.139 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #819FFB
#819FFB
oklch(71.9% 0.139 269.1)
- #C79F21
#C79F21
oklch(72% 0.139 89.3)
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 #819FFB, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Periwinkle Blue #8F99FB ΔE 0.022
- Cornflower Blue #6495ED ΔE 0.048
- Perrywinkle #8F8CE7 ΔE 0.052
- Lavender Blue #8B88F8 ΔE 0.057
- Carolina Blue #8AB8FE ΔE 0.068
- Chefchaouen Blue #4895EF ΔE 0.069
- Periwinkle #8E82FE ΔE 0.073
- Soft Blue #6488EA ΔE 0.075
Use #819FFB 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.