#819DCF
Closest named color: Greyblue (#77A1B5). oklch(69.4% 0.08 261.8), rgb(129, 157, 207).
Aa
Black text reads best on this color (7.65:1).
About this color
#819DCF is a medium-light, moderately saturated blue. In OKLCH its lightness is 69%, its chroma 0.080 and its hue 262°. Its hue sits on the cool side of the wheel. The nearest named color is Greyblue (#77A1B5), ΔE 0.046 away. Black text reads best on it, at 7.65:1.
| Hue family | Blues |
| Lightness | medium-light (69%) |
| Chroma | moderately saturated (0.080) |
| Temperature | cool |
| Nearest name | Greyblue (#77A1B5) |
| Black text | 7.65:1 |
| White text | 2.74:1 |
Values
| HEX | #819DCF |
| RGB | rgb(129, 157, 207) |
| HSL | hsl(218, 45%, 66%) |
| OKLCH | oklch(69.4% 0.08 261.8) |
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 #819DCF | 2.74:1 | Fails | Lc -58.2 | Large or bold text, headings |
| Black text on #819DCF | 7.65:1 | AAA | Lc 51.0 | Large or bold text, headings |
| #819DCF text on white | 2.74:1 | Fails | Lc 53.0 | Large or bold text, headings |
| #819DCF text on black | 7.65:1 | AAA | Lc -48.9 | 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
#E5EAF4
oklch(93.6% 0.015 264.5)
-
Step 200
200
#CFDAEC
oklch(88.5% 0.028 260.3)
-
Step 300
300
#AFC1E2
oklch(80.8% 0.051 262.6)
-
Step 400
400 (this color)
#819DCF
oklch(69.4% 0.08 261.8)
-
Step 500
500
#6789C8
oklch(63.1% 0.103 262.1)
-
Step 600
600
#4E72B4
oklch(55.6% 0.111 261.7)
-
Step 700
700
#3F5F9B
oklch(49% 0.104 262)
-
Step 800
800
#344E7E
oklch(42.7% 0.086 261.8)
-
Step 900
900
#2D4165
oklch(37.6% 0.067 261.5)
-
Step 950
950
#1B263B
oklch(26.9% 0.042 262.7)
#819DCF 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) | #8CA0D1 | 0.017 |
| Deuteranopia (no green cones) | #8399CE | 0.011 |
| Tritanopia (no blue cones) | #68A7AE | 0.071 |
| Achromatopsia (no color) | #9C9C9C | 0.080 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #819DCF
#819DCF
oklch(69.4% 0.08 261.8)
- #B69861
#B69861
oklch(69.4% 0.081 81.9)
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 #819DCF, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Greyblue #77A1B5 ΔE 0.046
- Cool Gray #8D99AE ΔE 0.048
- Bluey Grey #89A0B0 ΔE 0.050
- Bluegrey #85A3B2 ΔE 0.051
- Cool Steel #97A7B3 ΔE 0.063
- Cornflower Blue #6495ED ΔE 0.064
- Faded Blue #658CBB ΔE 0.065
- Silver Lake Blue #778DA9 ΔE 0.066
Use #819DCF 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.