#4583CC
Closest named color: Water Blue (#0E87CC). oklch(60.3% 0.129 253.9), rgb(69, 131, 204).
Aa
Black text reads best on this color (5.37:1).
About this color
#4583CC is a medium-dark, moderately saturated blue. In OKLCH its lightness is 60%, its chroma 0.129 and its hue 254°. Its hue sits on the cool side of the wheel. The nearest named color is Water Blue (#0E87CC), ΔE 0.029 away. Black text reads best on it, at 5.37:1.
| Hue family | Blues |
| Lightness | medium-dark (60%) |
| Chroma | moderately saturated (0.129) |
| Temperature | cool |
| Nearest name | Water Blue (#0E87CC) |
| Black text | 5.37:1 |
| White text | 3.90:1 |
Values
| HEX | #4583CC |
| RGB | rgb(69, 131, 204) |
| HSL | hsl(212, 57%, 54%) |
| OKLCH | oklch(60.3% 0.129 253.9) |
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 #4583CC | 3.90:1 | AA large text | Lc -71.8 | Content text, not long reading |
| Black text on #4583CC | 5.37:1 | AA | Lc 37.8 | Non-text elements, placeholder text |
| #4583CC text on white | 3.90:1 | AA large text | Lc 66.3 | Content text, not long reading |
| #4583CC text on black | 5.37:1 | AA | Lc -35.4 | 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
#F2F6FB
oklch(97.2% 0.008 253.9)
-
Step 100
100
#E2EBF6
oklch(93.7% 0.018 253.3)
-
Step 200
200
#CADBF0
oklch(88.5% 0.034 253.7)
-
Step 300
300
#A5C3E9
oklch(80.8% 0.063 254.5)
-
Step 400
400
#74A4DE
oklch(70.8% 0.1 253.7)
-
Step 500
500 (this color)
#4583CC
oklch(60.3% 0.129 253.9)
-
Step 600
600
#2F74C3
oklch(55.6% 0.141 254.1)
-
Step 700
700
#2161A8
oklch(49% 0.13 253.9)
-
Step 800
800
#1E5088
oklch(42.8% 0.107 253.7)
-
Step 900
900
#1E436D
oklch(37.8% 0.084 253.4)
-
Step 950
950
#132740
oklch(27% 0.054 254.9)
#4583CC 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) | #6388CF | 0.036 |
| Deuteranopia (no green cones) | #507BCB | 0.022 |
| Tritanopia (no blue cones) | #00949E | 0.102 |
| Achromatopsia (no color) | #818181 | 0.129 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #4583CC
#4583CC
oklch(60.3% 0.129 253.9)
- #AE7300
#AE7300
oklch(60.3% 0.128 73.6)
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 #4583CC, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Water Blue #0E87CC ΔE 0.029
- Cool Blue #4984B8 ΔE 0.032
- Steel Blue #4682B4 ΔE 0.037
- Windows Blue #3778BF ΔE 0.038
- Dark Sky Blue #448EE4 ΔE 0.043
- Off Blue #5684AE ΔE 0.049
- Faded Blue #658CBB ΔE 0.053
- Dusty Blue #5A86AD ΔE 0.054
Use #4583CC 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.