#819FCF
Closest named color: Greyblue (#77A1B5). oklch(69.8% 0.079 259.6), rgb(129, 159, 207).
Aa
Black text reads best on this color (7.79:1).
About this color
#819FCF is a medium-light, moderately saturated blue. In OKLCH its lightness is 70%, its chroma 0.079 and its hue 260°. Its hue sits on the cool side of the wheel. The nearest named color is Greyblue (#77A1B5), ΔE 0.044 away. Black text reads best on it, at 7.79:1.
| Hue family | Blues |
| Lightness | medium-light (70%) |
| Chroma | moderately saturated (0.079) |
| Temperature | cool |
| Nearest name | Greyblue (#77A1B5) |
| Black text | 7.79:1 |
| White text | 2.69:1 |
Values
| HEX | #819FCF |
| RGB | rgb(129, 159, 207) |
| HSL | hsl(217, 45%, 66%) |
| OKLCH | oklch(69.8% 0.079 259.6) |
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 #819FCF | 2.69:1 | Fails | Lc -57.5 | Large or bold text, headings |
| Black text on #819FCF | 7.79:1 | AAA | Lc 51.8 | Large or bold text, headings |
| #819FCF text on white | 2.69:1 | Fails | Lc 52.2 | Large or bold text, headings |
| #819FCF text on black | 7.79:1 | AAA | Lc -49.6 | 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
#F3F6FA
oklch(97.2% 0.006 255.5)
-
Step 100
100
#E4EAF4
oklch(93.5% 0.015 260.7)
-
Step 200
200
#CFDAEC
oklch(88.5% 0.028 260.3)
-
Step 300
300
#AEC2E1
oklch(80.9% 0.049 259.1)
-
Step 400
400 (this color)
#819FCF
oklch(69.8% 0.079 259.6)
-
Step 500
500
#658AC6
oklch(63.1% 0.1 259.8)
-
Step 600
600
#4C73B3
oklch(55.6% 0.109 259.9)
-
Step 700
700
#3D609A
oklch(49.1% 0.102 260)
-
Step 800
800
#324F7D
oklch(42.8% 0.084 259.3)
-
Step 900
900
#2C4264
oklch(37.7% 0.065 258.8)
-
Step 950
950
#1A273B
oklch(27.1% 0.042 258.8)
#819FCF 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) | #8EA2D1 | 0.019 |
| Deuteranopia (no green cones) | #869ACE | 0.014 |
| Tritanopia (no blue cones) | #68A9AF | 0.070 |
| Achromatopsia (no color) | #9E9E9E | 0.079 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #819FCF
#819FCF
oklch(69.8% 0.079 259.6)
- #B89965
#B89965
oklch(69.9% 0.078 79.9)
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 #819FCF, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Greyblue #77A1B5 ΔE 0.044
- Bluey Grey #89A0B0 ΔE 0.048
- Cool Gray #8D99AE ΔE 0.048
- Bluegrey #85A3B2 ΔE 0.048
- Cool Steel #97A7B3 ΔE 0.060
- Cornflower Blue #6495ED ΔE 0.067
- Silver Lake Blue #778DA9 ΔE 0.069
- Faded Blue #658CBB ΔE 0.069
Use #819FCF 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.