#819ECF
Closest named color: Greyblue (#77A1B5). oklch(69.6% 0.079 260.7), rgb(129, 158, 207).
Aa
Black text reads best on this color (7.72:1).
About this color
#819ECF is a medium-light, moderately saturated blue. In OKLCH its lightness is 70%, its chroma 0.079 and its hue 261°. Its hue sits on the cool side of the wheel. The nearest named color is Greyblue (#77A1B5), ΔE 0.045 away. Black text reads best on it, at 7.72:1.
| Hue family | Blues |
| Lightness | medium-light (70%) |
| Chroma | moderately saturated (0.079) |
| Temperature | cool |
| Nearest name | Greyblue (#77A1B5) |
| Black text | 7.72:1 |
| White text | 2.71:1 |
Values
| HEX | #819ECF |
| RGB | rgb(129, 158, 207) |
| HSL | hsl(218, 45%, 66%) |
| OKLCH | oklch(69.6% 0.079 260.7) |
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 #819ECF | 2.71:1 | Fails | Lc -57.8 | Large or bold text, headings |
| Black text on #819ECF | 7.72:1 | AAA | Lc 51.4 | Large or bold text, headings |
| #819ECF text on white | 2.71:1 | Fails | Lc 52.6 | Large or bold text, headings |
| #819ECF text on black | 7.72:1 | AAA | Lc -49.2 | 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
#AFC2E1
oklch(81% 0.049 260.2)
-
Step 400
400 (this color)
#819ECF
oklch(69.6% 0.079 260.7)
-
Step 500
500
#668AC7
oklch(63.2% 0.101 260.6)
-
Step 600
600
#4D73B4
oklch(55.7% 0.11 260.6)
-
Step 700
700
#3E609B
oklch(49.2% 0.103 260.8)
-
Step 800
800
#334E7D
oklch(42.6% 0.085 260.9)
-
Step 900
900
#2D4165
oklch(37.6% 0.067 261.5)
-
Step 950
950
#1A263B
oklch(26.8% 0.043 261.2)
#819ECF 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) | #8DA1D1 | 0.018 |
| Deuteranopia (no green cones) | #859ACE | 0.011 |
| Tritanopia (no blue cones) | #68A8AF | 0.070 |
| Achromatopsia (no color) | #9D9D9D | 0.079 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #819ECF
#819ECF
oklch(69.6% 0.079 260.7)
- #B79863
#B79863
oklch(69.6% 0.079 80.3)
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 #819ECF, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Greyblue #77A1B5 ΔE 0.045
- Cool Gray #8D99AE ΔE 0.048
- Bluey Grey #89A0B0 ΔE 0.049
- Bluegrey #85A3B2 ΔE 0.050
- Cool Steel #97A7B3 ΔE 0.061
- Cornflower Blue #6495ED ΔE 0.065
- Faded Blue #658CBB ΔE 0.067
- Silver Lake Blue #778DA9 ΔE 0.067
Use #819ECF 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.