#3583A4
Closest named color: Cerulean (#457B9D). oklch(57.6% 0.091 229.3), rgb(53, 131, 164).
Aa
Black text reads best on this color (4.93:1).
About this color
#3583A4 is a medium-dark, moderately saturated teal or cyan. In OKLCH its lightness is 58%, its chroma 0.091 and its hue 229°. Its hue sits on the cool side of the wheel. The nearest named color is Cerulean (#457B9D), ΔE 0.024 away. Black text reads best on it, at 4.93:1.
| Hue family | Teals and cyans |
| Lightness | medium-dark (58%) |
| Chroma | moderately saturated (0.091) |
| Temperature | cool |
| Nearest name | Cerulean (#457B9D) |
| Black text | 4.93:1 |
| White text | 4.25:1 |
Values
| HEX | #3583A4 |
| RGB | rgb(53, 131, 164) |
| HSL | hsl(198, 51%, 43%) |
| OKLCH | oklch(57.6% 0.091 229.3) |
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 #3583A4 | 4.25:1 | AA large text | Lc -74.6 | Content text, not long reading |
| Black text on #3583A4 | 4.93:1 | AA | Lc 34.9 | Non-text elements, placeholder text |
| #3583A4 text on white | 4.25:1 | AA large text | Lc 69.2 | Content text, not long reading |
| #3583A4 text on black | 4.93:1 | AA | Lc -32.5 | 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 600.
-
Step 50
50
#F2F6F8
oklch(97.1% 0.005 228.8)
-
Step 100
100
#E2ECF0
oklch(93.7% 0.012 223.5)
-
Step 200
200
#CBDCE5
oklch(88.4% 0.022 230.6)
-
Step 300
300
#A6C6D6
oklch(80.8% 0.041 229.5)
-
Step 400
400
#75A9C1
oklch(70.7% 0.065 228.5)
-
Step 500
500
#4F93B2
oklch(63.1% 0.083 229.6)
-
Step 600
600 (this color)
#3583A4
oklch(57.6% 0.091 229.3)
-
Step 700
700
#206987
oklch(49% 0.084 229.8)
-
Step 800
800
#1D566E
oklch(42.7% 0.07 229.7)
-
Step 900
900
#1E4759
oklch(37.7% 0.055 229.4)
-
Step 950
950
#132A34
oklch(27.1% 0.034 228.3)
#3583A4 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) | #7281A6 | 0.064 |
| Deuteranopia (no green cones) | #6376A4 | 0.056 |
| Tritanopia (no blue cones) | #008C8E | 0.054 |
| Achromatopsia (no color) | #7B7B7B | 0.091 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3583A4
#3583A4
oklch(57.6% 0.091 229.3)
- #A46847
#A46847
oklch(57.5% 0.091 49.1)
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 #3583A4, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cerulean #457B9D ΔE 0.024
- Teal Blue #01889F ΔE 0.026
- Blue NCS #118AB2 ΔE 0.027
- Stormy Blue #507B9C ΔE 0.030
- Steel Blue #4682B4 ΔE 0.031
- Off Blue #5684AE ΔE 0.035
- Cool Blue #4984B8 ΔE 0.037
- Dusty Blue #5A86AD ΔE 0.040
Use #3583A4 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.