#3D799B
Closest named color: Cerulean (#457B9D). oklch(55% 0.082 235.7), rgb(61, 121, 155).
Aa
White text reads best on this color (4.76:1).
About this color
#3D799B is a medium-dark, moderately saturated blue. In OKLCH its lightness is 55%, its chroma 0.082 and its hue 236°. Its hue sits on the cool side of the wheel. The nearest named color is Cerulean (#457B9D), ΔE 0.011 away. White text reads best on it, at 4.76:1.
| Hue family | Blues |
| Lightness | medium-dark (55%) |
| Chroma | moderately saturated (0.082) |
| Temperature | cool |
| Nearest name | Cerulean (#457B9D) |
| Black text | 4.40:1 |
| White text | 4.76:1 |
Values
| HEX | #3D799B |
| RGB | rgb(61, 121, 155) |
| HSL | hsl(202, 44%, 42%) |
| OKLCH | oklch(55% 0.082 235.7) |
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 #3D799B | 4.76:1 | AA | Lc -78.3 | Fine for body text |
| Black text on #3D799B | 4.40:1 | AA large text | Lc 31.2 | Non-text elements, placeholder text |
| #3D799B text on white | 4.76:1 | AA | Lc 72.9 | Content text, not long reading |
| #3D799B text on black | 4.40:1 | AA large text | Lc -28.8 | 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
#F2F6F8
oklch(97.1% 0.005 228.8)
-
Step 100
100
#E3EBF0
oklch(93.5% 0.011 234.8)
-
Step 200
200
#CDDCE5
oklch(88.6% 0.02 233.9)
-
Step 300
300
#ABC5D6
oklch(80.9% 0.037 236.6)
-
Step 400
400
#7DA7C1
oklch(70.7% 0.059 235.9)
-
Step 500
500
#5B91B1
oklch(63.2% 0.075 235.7)
-
Step 600
600 (this color)
#3D799B
oklch(55% 0.082 235.7)
-
Step 700
700
#306786
oklch(49% 0.076 236)
-
Step 800
800
#29546D
oklch(42.6% 0.063 236.4)
-
Step 900
900
#264658
oklch(37.8% 0.049 234.7)
-
Step 950
950
#172934
oklch(27.1% 0.031 236.4)
#3D799B 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) | #69789D | 0.050 |
| Deuteranopia (no green cones) | #5C6E9A | 0.043 |
| Tritanopia (no blue cones) | #008284 | 0.060 |
| Achromatopsia (no color) | #737373 | 0.082 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3D799B
#3D799B
oklch(55% 0.082 235.7)
- #966541
#966541
oklch(55.1% 0.081 56.4)
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 #3D799B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cerulean #457B9D ΔE 0.011
- Dull Blue #49759C ΔE 0.016
- Stormy Blue #507B9C ΔE 0.021
- Metallic Blue #4F738E ΔE 0.026
- Muted Blue #3B719F ΔE 0.027
- Flat Blue #3C73A8 ΔE 0.031
- Ocean #017B92 ΔE 0.035
- Sea Blue #047495 ΔE 0.037
Use #3D799B 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.