#4383BF
Closest named color: Cool Blue (#4984B8). oklch(59.5% 0.113 248.9), rgb(67, 131, 191).
Aa
Black text reads best on this color (5.23:1).
About this color
#4383BF is a medium-dark, moderately saturated blue. In OKLCH its lightness is 59%, its chroma 0.113 and its hue 249°. Its hue sits on the cool side of the wheel. The nearest named color is Cool Blue (#4984B8), ΔE 0.013 away. Black text reads best on it, at 5.23:1.
| Hue family | Blues |
| Lightness | medium-dark (59%) |
| Chroma | moderately saturated (0.113) |
| Temperature | cool |
| Nearest name | Cool Blue (#4984B8) |
| Black text | 5.23:1 |
| White text | 4.00:1 |
Values
| HEX | #4383BF |
| RGB | rgb(67, 131, 191) |
| HSL | hsl(209, 49%, 51%) |
| OKLCH | oklch(59.5% 0.113 248.9) |
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 #4383BF | 4.00:1 | AA large text | Lc -72.7 | Content text, not long reading |
| Black text on #4383BF | 5.23:1 | AA | Lc 36.9 | Non-text elements, placeholder text |
| #4383BF text on white | 4.00:1 | AA large text | Lc 67.2 | Content text, not long reading |
| #4383BF text on black | 5.23:1 | AA | Lc -34.5 | 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
#E2EBF4
oklch(93.6% 0.016 248)
-
Step 200
200
#CADBED
oklch(88.4% 0.031 249.7)
-
Step 300
300
#A6C4E4
oklch(80.9% 0.056 250.2)
-
Step 400
400
#74A5D6
oklch(70.6% 0.089 249.2)
-
Step 500
500 (this color)
#4383BF
oklch(59.5% 0.113 248.9)
-
Step 600
600
#2F77B8
oklch(55.6% 0.124 249.2)
-
Step 700
700
#21649E
oklch(49.1% 0.114 248.8)
-
Step 800
800
#1E5280
oklch(42.8% 0.094 248.7)
-
Step 900
900
#1E4467
oklch(37.7% 0.074 248.7)
-
Step 950
950
#13283C
oklch(27% 0.046 248.8)
#4383BF 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) | #6986C2 | 0.043 |
| Deuteranopia (no green cones) | #587ABE | 0.030 |
| Tritanopia (no blue cones) | #009198 | 0.088 |
| Achromatopsia (no color) | #7F7F7F | 0.113 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #4383BF
#4383BF
oklch(59.5% 0.113 248.9)
- #AA7126
#AA7126
oklch(59.6% 0.113 69.2)
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 #4383BF, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cool Blue #4984B8 ΔE 0.013
- Steel Blue #4682B4 ΔE 0.017
- Water Blue #0E87CC ΔE 0.031
- Off Blue #5684AE ΔE 0.032
- Windows Blue #3778BF ΔE 0.035
- Dusty Blue #5A86AD ΔE 0.038
- Blue NCS #118AB2 ΔE 0.041
- Faded Blue #658CBB ΔE 0.047
Use #4383BF 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.