#3D659F
Closest named color: Dusky Blue (#475F94). oklch(50.5% 0.103 257.7), rgb(61, 101, 159).
Aa
White text reads best on this color (5.89:1).
About this color
#3D659F is a medium-dark, moderately saturated blue. In OKLCH its lightness is 51%, its chroma 0.103 and its hue 258°. Its hue sits on the cool side of the wheel. The nearest named color is Dusky Blue (#475F94), ΔE 0.023 away. White text reads best on it, at 5.89:1.
| Hue family | Blues |
| Lightness | medium-dark (51%) |
| Chroma | moderately saturated (0.103) |
| Temperature | cool |
| Nearest name | Dusky Blue (#475F94) |
| Black text | 3.56:1 |
| White text | 5.89:1 |
Values
| HEX | #3D659F |
| RGB | rgb(61, 101, 159) |
| HSL | hsl(216, 45%, 43%) |
| OKLCH | oklch(50.5% 0.103 257.7) |
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 #3D659F | 5.89:1 | AA | Lc -84.5 | Fine for body text |
| Black text on #3D659F | 3.56:1 | AA large text | Lc 24.7 | Dividers and decoration only |
| #3D659F text on white | 5.89:1 | AA | Lc 79.3 | Fine for body text |
| #3D659F text on black | 3.56:1 | AA large text | Lc -22.5 | 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 700.
-
Step 50
50
#F3F6FA
oklch(97.2% 0.006 255.5)
-
Step 100
100
#E4EAF4
oklch(93.5% 0.015 260.7)
-
Step 200
200
#CEDAEC
oklch(88.5% 0.028 258.4)
-
Step 300
300
#ADC2E1
oklch(80.8% 0.05 258)
-
Step 400
400
#81A2D3
oklch(70.6% 0.081 258.1)
-
Step 500
500
#618BC7
oklch(63.1% 0.102 257.3)
-
Step 600
600
#4874B4
oklch(55.7% 0.111 257.7)
-
Step 700
700 (this color)
#3D659F
oklch(50.5% 0.103 257.7)
-
Step 800
800
#304F7D
oklch(42.6% 0.085 258.1)
-
Step 900
900
#2A4265
oklch(37.7% 0.067 257.7)
-
Step 950
950
#19273B
oklch(27% 0.042 257.3)
#3D659F 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) | #4C69A1 | 0.022 |
| Deuteranopia (no green cones) | #3F609E | 0.014 |
| Tritanopia (no blue cones) | #00727A | 0.088 |
| Achromatopsia (no color) | #646464 | 0.103 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3D659F
#3D659F
oklch(50.5% 0.103 257.7)
- #855C06
#855C06
oklch(50.6% 0.103 77.8)
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 #3D659F, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dusky Blue #475F94 ΔE 0.023
- French Blue #436BAD ΔE 0.027
- Denim #3B638C ΔE 0.031
- Denim Blue #3B5B92 ΔE 0.033
- Mid Blue #276AB3 ΔE 0.035
- Muted Blue #3B719F ΔE 0.035
- Flat Blue #3C73A8 ΔE 0.040
- Peacock Blue #016795 ΔE 0.040
Use #3D659F 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.