#4588CA
Closest named color: Cool Blue (#4984B8). oklch(61.3% 0.122 250.1), rgb(69, 136, 202).
Aa
Black text reads best on this color (5.62:1).
About this color
#4588CA is a medium-dark, moderately saturated blue. In OKLCH its lightness is 61%, its chroma 0.122 and its hue 250°. Its hue sits on the cool side of the wheel. The nearest named color is Cool Blue (#4984B8), ΔE 0.027 away. Black text reads best on it, at 5.62:1.
| Hue family | Blues |
| Lightness | medium-dark (61%) |
| Chroma | moderately saturated (0.122) |
| Temperature | cool |
| Nearest name | Cool Blue (#4984B8) |
| Black text | 5.62:1 |
| White text | 3.73:1 |
Values
| HEX | #4588CA |
| RGB | rgb(69, 136, 202) |
| HSL | hsl(210, 56%, 53%) |
| OKLCH | oklch(61.3% 0.122 250.1) |
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 #4588CA | 3.73:1 | AA large text | Lc -70.1 | Content text, not long reading |
| Black text on #4588CA | 5.62:1 | AA | Lc 39.4 | Non-text elements, placeholder text |
| #4588CA text on white | 3.73:1 | AA large text | Lc 64.6 | Content text, not long reading |
| #4588CA text on black | 5.62:1 | AA | Lc -37.0 | 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
#E2EBF5
oklch(93.6% 0.017 250.8)
-
Step 200
200
#C9DBEF
oklch(88.4% 0.034 251)
-
Step 300
300
#A4C4E6
oklch(80.8% 0.059 250.1)
-
Step 400
400
#72A5DA
oklch(70.7% 0.095 250.2)
-
Step 500
500 (this color)
#4588CA
oklch(61.3% 0.122 250.1)
-
Step 600
600
#2A76BD
oklch(55.5% 0.133 250.4)
-
Step 700
700
#1C63A3
oklch(49.1% 0.123 250.3)
-
Step 800
800
#1A5184
oklch(42.6% 0.102 250.2)
-
Step 900
900
#1C446A
oklch(37.8% 0.079 249.7)
-
Step 950
950
#12283E
oklch(27.1% 0.05 250.2)
#4588CA 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) | #6B8BCD | 0.042 |
| Deuteranopia (no green cones) | #597EC9 | 0.031 |
| Tritanopia (no blue cones) | #0097A0 | 0.093 |
| Achromatopsia (no color) | #848484 | 0.122 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #4588CA
#4588CA
oklch(61.3% 0.122 250.1)
- #B2751F
#B2751F
oklch(61.3% 0.122 69.8)
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 #4588CA, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cool Blue #4984B8 ΔE 0.027
- Water Blue #0E87CC ΔE 0.029
- Steel Blue #4682B4 ΔE 0.035
- Dark Sky Blue #448EE4 ΔE 0.040
- Faded Blue #658CBB ΔE 0.042
- Off Blue #5684AE ΔE 0.043
- Dusty Blue #5A86AD ΔE 0.046
- Windows Blue #3778BF ΔE 0.049
Use #4588CA 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.