#588FBC
Closest named color: Faded Blue (#658CBB). oklch(63% 0.09 244.6), rgb(88, 143, 188).
Aa
Black text reads best on this color (6.07:1).
About this color
#588FBC is a medium-light, moderately saturated blue. In OKLCH its lightness is 63%, its chroma 0.090 and its hue 245°. Its hue sits on the cool side of the wheel. The nearest named color is Faded Blue (#658CBB), ΔE 0.015 away. Black text reads best on it, at 6.07:1.
| Hue family | Blues |
| Lightness | medium-light (63%) |
| Chroma | moderately saturated (0.090) |
| Temperature | cool |
| Nearest name | Faded Blue (#658CBB) |
| Black text | 6.07:1 |
| White text | 3.45:1 |
Values
| HEX | #588FBC |
| RGB | rgb(88, 143, 188) |
| HSL | hsl(207, 43%, 54%) |
| OKLCH | oklch(63% 0.09 244.6) |
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 #588FBC | 3.45:1 | AA large text | Lc -67.5 | Content text, not long reading |
| Black text on #588FBC | 6.07:1 | AA | Lc 42.1 | Non-text elements, placeholder text |
| #588FBC text on white | 3.45:1 | AA large text | Lc 62.0 | Content text, not long reading |
| #588FBC text on black | 6.07:1 | AA | Lc -39.7 | 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
#F2F6F9
oklch(97.1% 0.006 239.8)
-
Step 100
100
#E3EBF2
oklch(93.6% 0.013 244.3)
-
Step 200
200
#CCDBE9
oklch(88.4% 0.025 246.2)
-
Step 300
300
#AAC4DC
oklch(80.9% 0.044 246.2)
-
Step 400
400
#7BA6CA
oklch(70.7% 0.07 244.3)
-
Step 500
500 (this color)
#588FBC
oklch(63% 0.09 244.6)
-
Step 600
600
#3C79A8
oklch(55.6% 0.097 244.1)
-
Step 700
700
#2E6590
oklch(49% 0.09 244.8)
-
Step 800
800
#275375
oklch(42.7% 0.075 244.2)
-
Step 900
900
#25455F
oklch(37.8% 0.059 244.8)
-
Step 950
950
#162837
oklch(26.9% 0.037 244.9)
#588FBC 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) | #7C90BE | 0.043 |
| Deuteranopia (no green cones) | #6F85BB | 0.035 |
| Tritanopia (no blue cones) | #1C9A9E | 0.076 |
| Achromatopsia (no color) | #8A8A8A | 0.090 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #588FBC
#588FBC
oklch(63% 0.09 244.6)
- #AF7E4D
#AF7E4D
oklch(63.1% 0.089 65)
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 #588FBC, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Faded Blue #658CBB ΔE 0.015
- Dusty Blue #5A86AD ΔE 0.030
- Off Blue #5684AE ΔE 0.034
- Cool Blue #4984B8 ΔE 0.036
- Silver Lake Blue #778DA9 ΔE 0.043
- Steel Blue #4682B4 ΔE 0.043
- Blue Grey #758DA3 ΔE 0.047
- Blue NCS #118AB2 ΔE 0.053
Use #588FBC 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.