#819DEE
Closest named color: Periwinkle Blue (#8F99FB). oklch(70.8% 0.123 268.6), rgb(129, 157, 238).
Aa
Black text reads best on this color (7.99:1).
About this color
#819DEE is a medium-light, moderately saturated blue. In OKLCH its lightness is 71%, its chroma 0.123 and its hue 269°. Its hue sits on the cool side of the wheel. The nearest named color is Periwinkle Blue (#8F99FB), ΔE 0.030 away. Black text reads best on it, at 7.99:1.
| Hue family | Blues |
| Lightness | medium-light (71%) |
| Chroma | moderately saturated (0.123) |
| Temperature | cool |
| Nearest name | Periwinkle Blue (#8F99FB) |
| Black text | 7.99:1 |
| White text | 2.62:1 |
Values
| HEX | #819DEE |
| RGB | rgb(129, 157, 238) |
| HSL | hsl(225, 76%, 72%) |
| OKLCH | oklch(70.8% 0.123 268.6) |
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 #819DEE | 2.62:1 | Fails | Lc -56.3 | Large or bold text, headings |
| Black text on #819DEE | 7.99:1 | AAA | Lc 52.9 | Large or bold text, headings |
| #819DEE text on white | 2.62:1 | Fails | Lc 51.1 | Large or bold text, headings |
| #819DEE text on black | 7.99:1 | AAA | Lc -50.8 | 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
#F2F5FD
oklch(97% 0.011 269.6)
-
Step 100
100
#E3EAF9
oklch(93.6% 0.022 265.8)
-
Step 200
200
#CDD9F6
oklch(88.5% 0.042 267.7)
-
Step 300
300
#ACBFF3
oklch(80.8% 0.077 269)
-
Step 400
400 (this color)
#819DEE
oklch(70.8% 0.123 268.6)
-
Step 500
500
#6282E8
oklch(63.1% 0.157 268.5)
-
Step 600
600
#4A69D6
oklch(55.6% 0.171 268.4)
-
Step 700
700
#3C57BA
oklch(49.2% 0.159 268.5)
-
Step 800
800
#324796
oklch(42.6% 0.132 269)
-
Step 900
900
#2B3D77
oklch(37.7% 0.101 268.3)
-
Step 950
950
#192446
oklch(27% 0.065 268.3)
#819DEE 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) | #7FA5F1 | 0.020 |
| Deuteranopia (no green cones) | #749BEC | 0.017 |
| Tritanopia (no blue cones) | #58AEBB | 0.110 |
| Achromatopsia (no color) | #A0A0A0 | 0.123 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #819DEE
#819DEE
oklch(70.8% 0.123 268.6)
- #C09C38
#C09C38
oklch(70.8% 0.123 88.6)
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 #819DEE, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Periwinkle Blue #8F99FB ΔE 0.030
- Cornflower Blue #6495ED ΔE 0.042
- Perrywinkle #8F8CE7 ΔE 0.044
- Lavender Blue #8B88F8 ΔE 0.059
- Chefchaouen Blue #4895EF ΔE 0.065
- Soft Blue #6488EA ΔE 0.069
- Carolina Blue #8AB8FE ΔE 0.073
- Periwinkle #8E82FE ΔE 0.077
Use #819DEE 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.