#819FBC
Closest named color: Greyblue (#77A1B5). oklch(69% 0.054 247.7), rgb(129, 159, 188).
Aa
Black text reads best on this color (7.61:1).
About this color
#819FBC is a medium-light, muted blue. In OKLCH its lightness is 69%, its chroma 0.054 and its hue 248°. Its hue sits on the cool side of the wheel. The nearest named color is Greyblue (#77A1B5), ΔE 0.018 away. Black text reads best on it, at 7.61:1.
| Hue family | Blues |
| Lightness | medium-light (69%) |
| Chroma | muted (0.054) |
| Temperature | cool |
| Nearest name | Greyblue (#77A1B5) |
| Black text | 7.61:1 |
| White text | 2.75:1 |
Values
| HEX | #819FBC |
| RGB | rgb(129, 159, 188) |
| HSL | hsl(209, 31%, 62%) |
| OKLCH | oklch(69% 0.054 247.7) |
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 #819FBC | 2.75:1 | Fails | Lc -58.5 | Large or bold text, headings |
| Black text on #819FBC | 7.61:1 | AAA | Lc 50.8 | Large or bold text, headings |
| #819FBC text on white | 2.75:1 | Fails | Lc 53.2 | Large or bold text, headings |
| #819FBC 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
#F3F6F8
oklch(97.1% 0.004 236.5)
-
Step 100
100
#E5EBF0
oklch(93.7% 0.009 242.8)
-
Step 200
200
#D0DBE5
oklch(88.6% 0.018 245.4)
-
Step 300
300
#B0C3D6
oklch(80.9% 0.034 248.2)
-
Step 400
400 (this color)
#819FBC
oklch(69% 0.054 247.7)
-
Step 500
500
#678EB2
oklch(63.2% 0.07 247)
-
Step 600
600
#4E779E
oklch(55.5% 0.076 248.2)
-
Step 700
700
#3F6487
oklch(49.1% 0.071 248.1)
-
Step 800
800
#34526D
oklch(42.7% 0.058 246.8)
-
Step 900
900
#2E4459
oklch(37.8% 0.046 248)
-
Step 950
950
#1B2834
oklch(27.1% 0.029 246.9)
#819FBC 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) | #949FBD | 0.025 |
| Deuteranopia (no green cones) | #8D99BB | 0.021 |
| Tritanopia (no blue cones) | #6FA6A8 | 0.047 |
| Achromatopsia (no color) | #9C9C9C | 0.054 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #819FBC
#819FBC
oklch(69% 0.054 247.7)
- #B39678
#B39678
oklch(69.2% 0.054 67.7)
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 #819FBC, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Greyblue #77A1B5 ΔE 0.018
- Bluey Grey #89A0B0 ΔE 0.021
- Bluegrey #85A3B2 ΔE 0.022
- Cool Gray #8D99AE ΔE 0.025
- Cool Steel #97A7B3 ΔE 0.042
- Cool Grey #95A3A6 ΔE 0.045
- Silver Lake Blue #778DA9 ΔE 0.054
- Blue Grey #758DA3 ΔE 0.059
Use #819FBC 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.