#588EEE
Closest named color: Soft Blue (#6488EA). oklch(65.5% 0.155 261.1), rgb(88, 142, 238).
Aa
Black text reads best on this color (6.51:1).
About this color
#588EEE is a medium-light, vivid blue. In OKLCH its lightness is 65%, its chroma 0.155 and its hue 261°. Its hue sits on the cool side of the wheel. The nearest named color is Soft Blue (#6488EA), ΔE 0.018 away. Black text reads best on it, at 6.51:1.
| Hue family | Blues |
| Lightness | medium-light (65%) |
| Chroma | vivid (0.155) |
| Temperature | cool |
| Nearest name | Soft Blue (#6488EA) |
| Black text | 6.51:1 |
| White text | 3.22:1 |
Values
| HEX | #588EEE |
| RGB | rgb(88, 142, 238) |
| HSL | hsl(218, 82%, 64%) |
| OKLCH | oklch(65.5% 0.155 261.1) |
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 #588EEE | 3.22:1 | AA large text | Lc -64.6 | Content text, not long reading |
| Black text on #588EEE | 6.51:1 | AA | Lc 44.9 | Non-text elements, placeholder text |
| #588EEE text on white | 3.22:1 | AA large text | Lc 59.2 | Large or bold text, headings |
| #588EEE text on black | 6.51:1 | AA | Lc -42.5 | 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
#F2F6FC
oklch(97.2% 0.009 258.3)
-
Step 100
100
#E2EAF9
oklch(93.5% 0.022 263.2)
-
Step 200
200
#CADAF6
oklch(88.5% 0.042 261.7)
-
Step 300
300
#A5C2F2
oklch(80.9% 0.075 260.4)
-
Step 400
400
#75A0EC
oklch(70.6% 0.122 261.3)
-
Step 500
500 (this color)
#588EEE
oklch(65.5% 0.155 261.1)
-
Step 600
600
#356ED4
oklch(55.6% 0.168 261)
-
Step 700
700
#285BB8
oklch(49% 0.157 261.2)
-
Step 800
800
#224B95
oklch(42.7% 0.13 261.1)
-
Step 900
900
#213F76
oklch(37.6% 0.101 261.4)
-
Step 950
950
#142645
oklch(27.1% 0.063 260.6)
#588EEE 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) | #6397F2 | 0.028 |
| Deuteranopia (no green cones) | #4D89EC | 0.018 |
| Tritanopia (no blue cones) | #00A4B2 | 0.130 |
| Achromatopsia (no color) | #8F8F8F | 0.155 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #588EEE
#588EEE
oklch(65.5% 0.155 261.1)
- #BA8600
#BA8600
oklch(65.4% 0.135 81.1)
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 #588EEE, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Soft Blue #6488EA ΔE 0.018
- Chefchaouen Blue #4895EF ΔE 0.021
- Cornflower Blue #6495ED ΔE 0.024
- Dark Sky Blue #448EE4 ΔE 0.024
- Dodger Blue #1E90FF ΔE 0.042
- Cornflower #6A79F7 ΔE 0.058
- Lavender Blue #8B88F8 ΔE 0.064
- Perrywinkle #8F8CE7 ΔE 0.066
Use #588EEE 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.