#5783BF
Closest named color: Cool Blue (#4984B8). oklch(60.4% 0.104 256.4), rgb(87, 131, 191).
Aa
Black text reads best on this color (5.40:1).
About this color
#5783BF is a medium-dark, moderately saturated blue. In OKLCH its lightness is 60%, its chroma 0.104 and its hue 256°. Its hue sits on the cool side of the wheel. The nearest named color is Cool Blue (#4984B8), ΔE 0.019 away. Black text reads best on it, at 5.40:1.
| Hue family | Blues |
| Lightness | medium-dark (60%) |
| Chroma | moderately saturated (0.104) |
| Temperature | cool |
| Nearest name | Cool Blue (#4984B8) |
| Black text | 5.40:1 |
| White text | 3.88:1 |
Values
| HEX | #5783BF |
| RGB | rgb(87, 131, 191) |
| HSL | hsl(215, 45%, 55%) |
| OKLCH | oklch(60.4% 0.104 256.4) |
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 #5783BF | 3.88:1 | AA large text | Lc -71.7 | Content text, not long reading |
| Black text on #5783BF | 5.40:1 | AA | Lc 37.9 | Non-text elements, placeholder text |
| #5783BF text on white | 3.88:1 | AA large text | Lc 66.2 | Content text, not long reading |
| #5783BF text on black | 5.40:1 | AA | Lc -35.5 | Non-text elements, placeholder text |
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 500.
-
Step 50
50
#F2F6FA
oklch(97.1% 0.007 247.9)
-
Step 100
100
#E4EAF4
oklch(93.5% 0.015 260.7)
-
Step 200
200
#CDDAEC
oklch(88.4% 0.029 256.5)
-
Step 300
300
#ACC3E2
oklch(81% 0.051 255.9)
-
Step 400
400
#7FA3D3
oklch(70.7% 0.081 255.8)
-
Step 500
500 (this color)
#5783BF
oklch(60.4% 0.104 256.4)
-
Step 600
600
#4574B4
oklch(55.5% 0.113 256.5)
-
Step 700
700
#36619B
oklch(49% 0.105 256.4)
-
Step 800
800
#2D507E
oklch(42.8% 0.087 255.9)
-
Step 900
900
#294265
oklch(37.6% 0.068 257)
-
Step 950
950
#18273B
oklch(27% 0.043 255.9)
#5783BF 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) | #6B87C2 | 0.028 |
| Deuteranopia (no green cones) | #5E7DBE | 0.017 |
| Tritanopia (no blue cones) | #189098 | 0.092 |
| Achromatopsia (no color) | #818181 | 0.104 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #5783BF
#5783BF
oklch(60.4% 0.104 256.4)
- #A57830
#A57830
oklch(60.4% 0.104 75.9)
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 #5783BF, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cool Blue #4984B8 ΔE 0.019
- Steel Blue #4682B4 ΔE 0.025
- Off Blue #5684AE ΔE 0.028
- Dusty Blue #5A86AD ΔE 0.032
- Faded Blue #658CBB ΔE 0.033
- Water Blue #0E87CC ΔE 0.047
- Windows Blue #3778BF ΔE 0.047
- Blue NCS #118AB2 ΔE 0.055
Use #5783BF 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.