#3A70AB
Closest named color: Flat Blue (#3C73A8). oklch(53.6% 0.11 252.3), rgb(58, 112, 171).
Aa
White text reads best on this color (5.13:1).
About this color
#3A70AB is a medium-dark, moderately saturated blue. In OKLCH its lightness is 54%, its chroma 0.110 and its hue 252°. Its hue sits on the cool side of the wheel. The nearest named color is Flat Blue (#3C73A8), ΔE 0.011 away. White text reads best on it, at 5.13:1.
| Hue family | Blues |
| Lightness | medium-dark (54%) |
| Chroma | moderately saturated (0.110) |
| Temperature | cool |
| Nearest name | Flat Blue (#3C73A8) |
| Black text | 4.08:1 |
| White text | 5.13:1 |
Values
| HEX | #3A70AB |
| RGB | rgb(58, 112, 171) |
| HSL | hsl(211, 49%, 45%) |
| OKLCH | oklch(53.6% 0.11 252.3) |
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 #3A70AB | 5.13:1 | AA | Lc -80.6 | Fine for body text |
| Black text on #3A70AB | 4.08:1 | AA large text | Lc 28.9 | Dividers and decoration only |
| #3A70AB text on white | 5.13:1 | AA | Lc 75.2 | Fine for body text |
| #3A70AB text on black | 4.08:1 | AA large text | Lc -26.5 | 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 600.
-
Step 50
50
#F2F6FA
oklch(97.1% 0.007 247.9)
-
Step 100
100
#E3EBF3
oklch(93.6% 0.014 248)
-
Step 200
200
#CDDBEB
oklch(88.6% 0.027 251.7)
-
Step 300
300
#AAC3E0
oklch(80.8% 0.049 252.3)
-
Step 400
400
#7DA4D1
oklch(70.7% 0.079 252.5)
-
Step 500
500
#5B8DC5
oklch(63.2% 0.101 252.2)
-
Step 600
600 (this color)
#3A70AB
oklch(53.6% 0.11 252.3)
-
Step 700
700
#326399
oklch(49.2% 0.102 252.6)
-
Step 800
800
#2A517C
oklch(42.8% 0.085 252.4)
-
Step 900
900
#264363
oklch(37.6% 0.065 252.1)
-
Step 950
950
#17283A
oklch(27.1% 0.041 250.8)
#3A70AB 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) | #5673AD | 0.033 |
| Deuteranopia (no green cones) | #4769AA | 0.022 |
| Tritanopia (no blue cones) | #007E85 | 0.088 |
| Achromatopsia (no color) | #6D6D6D | 0.110 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3A70AB
#3A70AB
oklch(53.6% 0.11 252.3)
- #94620F
#94620F
oklch(53.7% 0.11 72.7)
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 #3A70AB, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Flat Blue #3C73A8 ΔE 0.011
- French Blue #436BAD ΔE 0.017
- Muted Blue #3B719F ΔE 0.020
- Mid Blue #276AB3 ΔE 0.029
- Nice Blue #107AB0 ΔE 0.033
- Dull Blue #49759C ΔE 0.034
- Windows Blue #3778BF ΔE 0.035
- Ocean Blue #03719C ΔE 0.039
Use #3A70AB 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.