#3A88AB
Closest named color: Blue NCS (#118AB2). oklch(59.3% 0.093 230.6), rgb(58, 136, 171).
Aa
Black text reads best on this color (5.28:1).
About this color
#3A88AB is a medium-dark, moderately saturated blue. In OKLCH its lightness is 59%, its chroma 0.093 and its hue 231°. Its hue sits on the cool side of the wheel. The nearest named color is Blue NCS (#118AB2), ΔE 0.020 away. Black text reads best on it, at 5.28:1.
| Hue family | Blues |
| Lightness | medium-dark (59%) |
| Chroma | moderately saturated (0.093) |
| Temperature | cool |
| Nearest name | Blue NCS (#118AB2) |
| Black text | 5.28:1 |
| White text | 3.97:1 |
Values
| HEX | #3A88AB |
| RGB | rgb(58, 136, 171) |
| HSL | hsl(199, 49%, 45%) |
| OKLCH | oklch(59.3% 0.093 230.6) |
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 #3A88AB | 3.97:1 | AA large text | Lc -72.3 | Content text, not long reading |
| Black text on #3A88AB | 5.28:1 | AA | Lc 37.3 | Non-text elements, placeholder text |
| #3A88AB text on white | 3.97:1 | AA large text | Lc 66.8 | Content text, not long reading |
| #3A88AB text on black | 5.28:1 | AA | Lc -34.9 | 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 600.
-
Step 50
50
#F2F6F8
oklch(97.1% 0.005 228.8)
-
Step 100
100
#E2ECF0
oklch(93.7% 0.012 223.5)
-
Step 200
200
#CBDCE6
oklch(88.5% 0.023 233.4)
-
Step 300
300
#A6C6D7
oklch(80.9% 0.042 231.1)
-
Step 400
400
#75A9C3
oklch(70.8% 0.067 230.6)
-
Step 500
500
#4E93B3
oklch(63.1% 0.085 230.2)
-
Step 600
600 (this color)
#3A88AB
oklch(59.3% 0.093 230.6)
-
Step 700
700
#1F6988
oklch(49.1% 0.086 230.5)
-
Step 800
800
#1C566F
oklch(42.8% 0.072 230.5)
-
Step 900
900
#1E475A
oklch(37.7% 0.056 230.9)
-
Step 950
950
#132A34
oklch(27.1% 0.034 228.3)
#3A88AB 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) | #7686AD | 0.063 |
| Deuteranopia (no green cones) | #677BAB | 0.055 |
| Tritanopia (no blue cones) | #009294 | 0.058 |
| Achromatopsia (no color) | #808080 | 0.093 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3A88AB
#3A88AB
oklch(59.3% 0.093 230.6)
- #AA6D4A
#AA6D4A
oklch(59.2% 0.092 50.1)
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 #3A88AB, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Blue NCS #118AB2 ΔE 0.020
- Steel Blue #4682B4 ΔE 0.027
- Off Blue #5684AE ΔE 0.028
- Cool Blue #4984B8 ΔE 0.029
- Dusty Blue #5A86AD ΔE 0.030
- Teal Blue #01889F ΔE 0.032
- Cerulean #457B9D ΔE 0.038
- Stormy Blue #507B9C ΔE 0.040
Use #3A88AB 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.