#3D7DBA
Closest named color: Windows Blue (#3778BF). oklch(57.6% 0.115 249.5), rgb(61, 125, 186).
Aa
Black text reads best on this color (4.84:1).
About this color
#3D7DBA is a medium-dark, moderately saturated blue. In OKLCH its lightness is 58%, its chroma 0.115 and its hue 250°. Its hue sits on the cool side of the wheel. The nearest named color is Windows Blue (#3778BF), ΔE 0.019 away. Black text reads best on it, at 4.84:1.
| Hue family | Blues |
| Lightness | medium-dark (58%) |
| Chroma | moderately saturated (0.115) |
| Temperature | cool |
| Nearest name | Windows Blue (#3778BF) |
| Black text | 4.84:1 |
| White text | 4.33:1 |
Values
| HEX | #3D7DBA |
| RGB | rgb(61, 125, 186) |
| HSL | hsl(209, 51%, 48%) |
| OKLCH | oklch(57.6% 0.115 249.5) |
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 #3D7DBA | 4.33:1 | AA large text | Lc -75.3 | Fine for body text |
| Black text on #3D7DBA | 4.84:1 | AA | Lc 34.3 | Non-text elements, placeholder text |
| #3D7DBA text on white | 4.33:1 | AA large text | Lc 69.8 | Content text, not long reading |
| #3D7DBA text on black | 4.84:1 | AA | Lc -31.9 | 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
#F2F6FA
oklch(97.1% 0.007 247.9)
-
Step 100
100
#E3EBF4
oklch(93.7% 0.015 251.2)
-
Step 200
200
#CBDBEC
oklch(88.5% 0.029 249.8)
-
Step 300
300
#A8C4E1
oklch(80.9% 0.051 249.4)
-
Step 400
400
#78A5D3
oklch(70.7% 0.083 249.6)
-
Step 500
500
#548EC7
oklch(63.1% 0.106 249.4)
-
Step 600
600 (this color)
#3D7DBA
oklch(57.6% 0.115 249.5)
-
Step 700
700
#29649B
oklch(49.2% 0.107 249.6)
-
Step 800
800
#23527D
oklch(42.8% 0.088 248.9)
-
Step 900
900
#224465
oklch(37.7% 0.069 249.5)
-
Step 950
950
#15283B
oklch(27.1% 0.044 249.7)
#3D7DBA 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) | #6280BD | 0.041 |
| Deuteranopia (no green cones) | #5174B9 | 0.029 |
| Tritanopia (no blue cones) | #008B93 | 0.088 |
| Achromatopsia (no color) | #797979 | 0.115 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3D7DBA
#3D7DBA
oklch(57.6% 0.115 249.5)
- #A46B1B
#A46B1B
oklch(57.6% 0.115 69.5)
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 #3D7DBA, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Windows Blue #3778BF ΔE 0.019
- Steel Blue #4682B4 ΔE 0.021
- Cool Blue #4984B8 ΔE 0.025
- Nice Blue #107AB0 ΔE 0.033
- Flat Blue #3C73A8 ΔE 0.036
- Water Blue #0E87CC ΔE 0.037
- Off Blue #5684AE ΔE 0.040
- Cerulean #457B9D ΔE 0.045
Use #3D7DBA 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.