#3A7EB9
Closest named color: Steel Blue (#4682B4). oklch(57.6% 0.114 247.5), rgb(58, 126, 185).
Aa
Black text reads best on this color (4.86:1).
About this color
#3A7EB9 is a medium-dark, moderately saturated blue. In OKLCH its lightness is 58%, its chroma 0.114 and its hue 248°. Its hue sits on the cool side of the wheel. The nearest named color is Steel Blue (#4682B4), ΔE 0.019 away. Black text reads best on it, at 4.86:1.
| Hue family | Blues |
| Lightness | medium-dark (58%) |
| Chroma | moderately saturated (0.114) |
| Temperature | cool |
| Nearest name | Steel Blue (#4682B4) |
| Black text | 4.86:1 |
| White text | 4.31:1 |
Values
| HEX | #3A7EB9 |
| RGB | rgb(58, 126, 185) |
| HSL | hsl(208, 52%, 48%) |
| OKLCH | oklch(57.6% 0.114 247.5) |
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 #3A7EB9 | 4.31:1 | AA large text | Lc -75.1 | Fine for body text |
| Black text on #3A7EB9 | 4.86:1 | AA | Lc 34.5 | Non-text elements, placeholder text |
| #3A7EB9 text on white | 4.31:1 | AA large text | Lc 69.6 | Content text, not long reading |
| #3A7EB9 text on black | 4.86:1 | AA | Lc -32.1 | 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
#F2F6FA
oklch(97.1% 0.007 247.9)
-
Step 100
100
#E2EBF4
oklch(93.6% 0.016 248)
-
Step 200
200
#CBDBEC
oklch(88.5% 0.029 249.8)
-
Step 300
300
#A7C4E1
oklch(80.8% 0.052 248.5)
-
Step 400
400
#77A6D2
oklch(70.8% 0.082 247.4)
-
Step 500
500
#528FC6
oklch(63.2% 0.105 247.5)
-
Step 600
600 (this color)
#3A7EB9
oklch(57.6% 0.114 247.5)
-
Step 700
700
#256599
oklch(49.2% 0.105 246.8)
-
Step 800
800
#21527C
oklch(42.6% 0.088 247.5)
-
Step 900
900
#214464
oklch(37.6% 0.069 248.2)
-
Step 950
950
#14283B
oklch(27% 0.044 248.6)
#3A7EB9 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) | #6480BC | 0.045 |
| Deuteranopia (no green cones) | #5274B8 | 0.033 |
| Tritanopia (no blue cones) | #008C93 | 0.086 |
| Achromatopsia (no color) | #7A7A7A | 0.114 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3A7EB9
#3A7EB9
oklch(57.6% 0.114 247.5)
- #A56A1F
#A56A1F
oklch(57.5% 0.114 67.3)
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 #3A7EB9, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Steel Blue #4682B4 ΔE 0.019
- Windows Blue #3778BF ΔE 0.022
- Cool Blue #4984B8 ΔE 0.024
- Nice Blue #107AB0 ΔE 0.031
- Water Blue #0E87CC ΔE 0.036
- Flat Blue #3C73A8 ΔE 0.037
- Off Blue #5684AE ΔE 0.039
- Blue NCS #118AB2 ΔE 0.042
Use #3A7EB9 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.