#819FDF
Closest named color: Periwinkle Blue (#8F99FB). oklch(70.5% 0.1 264.7), rgb(129, 159, 223).
Aa
Black text reads best on this color (7.95:1).
About this color
#819FDF is a medium-light, moderately saturated blue. In OKLCH its lightness is 71%, its chroma 0.100 and its hue 265°. Its hue sits on the cool side of the wheel. The nearest named color is Periwinkle Blue (#8F99FB), ΔE 0.051 away. Black text reads best on it, at 7.95:1.
| Hue family | Blues |
| Lightness | medium-light (71%) |
| Chroma | moderately saturated (0.100) |
| Temperature | cool |
| Nearest name | Periwinkle Blue (#8F99FB) |
| Black text | 7.95:1 |
| White text | 2.63:1 |
Values
| HEX | #819FDF |
| RGB | rgb(129, 159, 223) |
| HSL | hsl(221, 59%, 69%) |
| OKLCH | oklch(70.5% 0.1 264.7) |
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 #819FDF | 2.63:1 | Fails | Lc -56.5 | Large or bold text, headings |
| Black text on #819FDF | 7.95:1 | AAA | Lc 52.7 | Large or bold text, headings |
| #819FDF text on white | 2.63:1 | Fails | Lc 51.3 | Large or bold text, headings |
| #819FDF text on black | 7.95:1 | AAA | Lc -50.6 | 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
#F3F5FB
oklch(97% 0.008 271.3)
-
Step 100
100
#E4EAF6
oklch(93.6% 0.017 264.5)
-
Step 200
200
#CED9F1
oklch(88.4% 0.035 266)
-
Step 300
300
#ADC1EA
oklch(81% 0.062 264.6)
-
Step 400
400 (this color)
#819FDF
oklch(70.5% 0.1 264.7)
-
Step 500
500
#6287D7
oklch(63.2% 0.128 264.3)
-
Step 600
600
#4A6FC4
oklch(55.7% 0.139 264.6)
-
Step 700
700
#3B5CA9
oklch(49% 0.129 264.6)
-
Step 800
800
#314C89
oklch(42.8% 0.106 264.4)
-
Step 900
900
#2B406E
oklch(37.8% 0.083 264.3)
-
Step 950
950
#192540
oklch(26.8% 0.053 264.9)
#819FDF 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) | #88A4E2 | 0.017 |
| Deuteranopia (no green cones) | #7F9BDE | 0.011 |
| Tritanopia (no blue cones) | #60ACB6 | 0.089 |
| Achromatopsia (no color) | #9F9F9F | 0.100 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #819FDF
#819FDF
oklch(70.5% 0.1 264.7)
- #BD9B52
#BD9B52
oklch(70.5% 0.1 84.7)
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 #819FDF, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Periwinkle Blue #8F99FB ΔE 0.051
- Cornflower Blue #6495ED ΔE 0.052
- Perrywinkle #8F8CE7 ΔE 0.056
- Greyblue #77A1B5 ΔE 0.067
- Cool Gray #8D99AE ΔE 0.071
- Bluey Grey #89A0B0 ΔE 0.072
- Bluegrey #85A3B2 ΔE 0.072
- Chefchaouen Blue #4895EF ΔE 0.072
Use #819FDF 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.