#3A588B
Closest named color: Denim Blue (#3B5B92). oklch(46.2% 0.091 260.5), rgb(58, 88, 139).
Aa
White text reads best on this color (7.12:1).
About this color
#3A588B is a medium-dark, moderately saturated blue. In OKLCH its lightness is 46%, its chroma 0.091 and its hue 260°. Its hue sits on the cool side of the wheel. The nearest named color is Denim Blue (#3B5B92), ΔE 0.013 away. White text reads best on it, at 7.12:1.
| Hue family | Blues |
| Lightness | medium-dark (46%) |
| Chroma | moderately saturated (0.091) |
| Temperature | cool |
| Nearest name | Denim Blue (#3B5B92) |
| Black text | 2.94:1 |
| White text | 7.12:1 |
Values
| HEX | #3A588B |
| RGB | rgb(58, 88, 139) |
| HSL | hsl(218, 41%, 39%) |
| OKLCH | oklch(46.2% 0.091 260.5) |
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 #3A588B | 7.12:1 | AAA | Lc -89.5 | Fine for body text |
| Black text on #3A588B | 2.94:1 | Fails | Lc 19.5 | Dividers and decoration only |
| #3A588B text on white | 7.12:1 | AAA | Lc 84.6 | Fine for body text |
| #3A588B text on black | 2.94:1 | Fails | Lc -17.4 | Dividers and decoration only |
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 700.
-
Step 50
50
#F3F6F9
oklch(97.2% 0.005 247.9)
-
Step 100
100
#E5EAF3
oklch(93.6% 0.013 262.4)
-
Step 200
200
#D0DAEA
oklch(88.6% 0.025 259.8)
-
Step 300
300
#B1C2DE
oklch(81% 0.044 260.4)
-
Step 400
400
#87A2CD
oklch(70.8% 0.07 259.6)
-
Step 500
500
#6A8AC0
oklch(63.1% 0.09 260.6)
-
Step 600
600
#5173AC
oklch(55.5% 0.098 260.3)
-
Step 700
700 (this color)
#3A588B
oklch(46.2% 0.091 260.5)
-
Step 800
800
#364F78
oklch(42.7% 0.075 259.9)
-
Step 900
900
#2F4261
oklch(37.8% 0.059 259.9)
-
Step 950
950
#1C2739
oklch(27.1% 0.037 260)
#3A588B 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) | #435C8D | 0.017 |
| Deuteranopia (no green cones) | #39548A | 0.012 |
| Tritanopia (no blue cones) | #00636B | 0.080 |
| Achromatopsia (no color) | #585858 | 0.091 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3A588B
#3A588B
oklch(46.2% 0.091 260.5)
- #73520B
#73520B
oklch(46.2% 0.091 80.1)
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 #3A588B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Denim Blue #3B5B92 ΔE 0.013
- Light Navy Blue #2E5A88 ΔE 0.015
- Dusk Blue #26538D ΔE 0.028
- Dusk #4E5481 ΔE 0.030
- Dusky Blue #475F94 ΔE 0.030
- Twilight #4E518B ΔE 0.031
- Denim #3B638C ΔE 0.033
- YInMn Blue #415A77 ΔE 0.036
Use #3A588B 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.