#819DCB
Closest named color: Greyblue (#77A1B5). oklch(69.2% 0.075 260.2), rgb(129, 157, 203).
Aa
Black text reads best on this color (7.61:1).
About this color
#819DCB is a medium-light, moderately saturated blue. In OKLCH its lightness is 69%, its chroma 0.075 and its hue 260°. Its hue sits on the cool side of the wheel. The nearest named color is Greyblue (#77A1B5), ΔE 0.041 away. Black text reads best on it, at 7.61:1.
| Hue family | Blues |
| Lightness | medium-light (69%) |
| Chroma | moderately saturated (0.075) |
| Temperature | cool |
| Nearest name | Greyblue (#77A1B5) |
| Black text | 7.61:1 |
| White text | 2.75:1 |
Values
| HEX | #819DCB |
| RGB | rgb(129, 157, 203) |
| HSL | hsl(217, 42%, 65%) |
| OKLCH | oklch(69.2% 0.075 260.2) |
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 #819DCB | 2.75:1 | Fails | Lc -58.4 | Large or bold text, headings |
| Black text on #819DCB | 7.61:1 | AAA | Lc 50.8 | Large or bold text, headings |
| #819DCB text on white | 2.75:1 | Fails | Lc 53.2 | Large or bold text, headings |
| #819DCB text on black | 7.61:1 | AAA | Lc -48.6 | 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
#E5EAF3
oklch(93.6% 0.013 262.4)
-
Step 200
200
#CFDAEB
oklch(88.5% 0.026 259)
-
Step 300
300
#AFC2E0
oklch(80.9% 0.047 259.5)
-
Step 400
400 (this color)
#819DCB
oklch(69.2% 0.075 260.2)
-
Step 500
500
#678AC4
oklch(63.1% 0.097 260.2)
-
Step 600
600
#4E73B0
oklch(55.6% 0.104 260)
-
Step 700
700
#3F6097
oklch(49% 0.097 260.1)
-
Step 800
800
#344F7B
oklch(42.7% 0.081 259.8)
-
Step 900
900
#2E4263
oklch(37.8% 0.062 260.1)
-
Step 950
950
#1B273A
oklch(27.1% 0.039 259.4)
#819DCB 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) | #8DA0CD | 0.018 |
| Deuteranopia (no green cones) | #8599CA | 0.011 |
| Tritanopia (no blue cones) | #6AA7AD | 0.066 |
| Achromatopsia (no color) | #9C9C9C | 0.075 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #819DCB
#819DCB
oklch(69.2% 0.075 260.2)
- #B49766
#B49766
oklch(69.1% 0.074 80.1)
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 #819DCB, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Greyblue #77A1B5 ΔE 0.041
- Cool Gray #8D99AE ΔE 0.043
- Bluey Grey #89A0B0 ΔE 0.045
- Bluegrey #85A3B2 ΔE 0.046
- Cool Steel #97A7B3 ΔE 0.059
- Silver Lake Blue #778DA9 ΔE 0.062
- Faded Blue #658CBB ΔE 0.063
- Cool Grey #95A3A6 ΔE 0.067
Use #819DCB 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.