#3F7490
Closest named color: Metallic Blue (#4F738E). oklch(53.4% 0.072 233.4), rgb(63, 116, 144).
Aa
White text reads best on this color (5.10:1).
About this color
#3F7490 is a medium-dark, moderately saturated blue. In OKLCH its lightness is 53%, its chroma 0.072 and its hue 233°. Its hue sits on the cool side of the wheel. The nearest named color is Metallic Blue (#4F738E), ΔE 0.017 away. White text reads best on it, at 5.10:1.
| Hue family | Blues |
| Lightness | medium-dark (53%) |
| Chroma | moderately saturated (0.072) |
| Temperature | cool |
| Nearest name | Metallic Blue (#4F738E) |
| Black text | 4.11:1 |
| White text | 5.10:1 |
Values
| HEX | #3F7490 |
| RGB | rgb(63, 116, 144) |
| HSL | hsl(201, 39%, 41%) |
| OKLCH | oklch(53.4% 0.072 233.4) |
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 #3F7490 | 5.10:1 | AA | Lc -80.5 | Fine for body text |
| Black text on #3F7490 | 4.11:1 | AA large text | Lc 29.0 | Dividers and decoration only |
| #3F7490 text on white | 5.10:1 | AA | Lc 75.1 | Fine for body text |
| #3F7490 text on black | 4.11:1 | AA large text | Lc -26.6 | 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
#F3F6F8
oklch(97.1% 0.004 236.5)
-
Step 100
100
#E4EBEF
oklch(93.6% 0.009 232.4)
-
Step 200
200
#CEDBE3
oklch(88.4% 0.018 234.5)
-
Step 300
300
#ADC5D2
oklch(81% 0.032 231.4)
-
Step 400
400
#81A7BC
oklch(70.8% 0.052 232.6)
-
Step 500
500
#6091AB
oklch(63.2% 0.066 232.4)
-
Step 600
600 (this color)
#3F7490
oklch(53.4% 0.072 233.4)
-
Step 700
700
#376781
oklch(49.1% 0.067 234.1)
-
Step 800
800
#2E5469
oklch(42.7% 0.056 234.3)
-
Step 900
900
#294655
oklch(37.8% 0.043 232.1)
-
Step 950
950
#192932
oklch(27.1% 0.027 233.8)
#3F7490 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) | #677391 | 0.048 |
| Deuteranopia (no green cones) | #5B6A90 | 0.041 |
| Tritanopia (no blue cones) | #007C7D | 0.055 |
| Achromatopsia (no color) | #6E6E6E | 0.072 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3F7490
#3F7490
oklch(53.4% 0.072 233.4)
- #8E6145
#8E6145
oklch(53.4% 0.072 52.5)
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 #3F7490, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Metallic Blue #4F738E ΔE 0.017
- Dull Blue #49759C ΔE 0.023
- Cerulean #457B9D ΔE 0.027
- Muted Blue #3B719F ΔE 0.028
- Sea Blue #047495 ΔE 0.032
- Stormy Blue #507B9C ΔE 0.033
- Ocean #017B92 ΔE 0.034
- Flat Blue #3C73A8 ΔE 0.039
Use #3F7490 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.