#337699
Closest named color: Muted Blue (#3B719F). oklch(53.8% 0.087 234.5), rgb(51, 118, 153).
Aa
White text reads best on this color (5.00:1).
About this color
#337699 is a medium-dark, moderately saturated blue. In OKLCH its lightness is 54%, its chroma 0.087 and its hue 234°. Its hue sits on the cool side of the wheel. The nearest named color is Muted Blue (#3B719F), ΔE 0.020 away. White text reads best on it, at 5.00:1.
| Hue family | Blues |
| Lightness | medium-dark (54%) |
| Chroma | moderately saturated (0.087) |
| Temperature | cool |
| Nearest name | Muted Blue (#3B719F) |
| Black text | 4.19:1 |
| White text | 5.00:1 |
Values
| HEX | #337699 |
| RGB | rgb(51, 118, 153) |
| HSL | hsl(201, 50%, 40%) |
| OKLCH | oklch(53.8% 0.087 234.5) |
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 #337699 | 5.00:1 | AA | Lc -79.8 | Fine for body text |
| Black text on #337699 | 4.19:1 | AA large text | Lc 29.7 | Dividers and decoration only |
| #337699 text on white | 5.00:1 | AA | Lc 74.4 | Content text, not long reading |
| #337699 text on black | 4.19:1 | AA large text | Lc -27.3 | 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
#CCDCE6
oklch(88.5% 0.022 235)
-
Step 300
300
#A9C5D6
oklch(80.8% 0.039 234.6)
-
Step 400
400
#7AA8C2
oklch(70.8% 0.062 233.6)
-
Step 500
500
#5692B3
oklch(63.2% 0.08 234.1)
-
Step 600
600 (this color)
#337699
oklch(53.8% 0.087 234.5)
-
Step 700
700
#2A6888
oklch(49.2% 0.081 234.4)
-
Step 800
800
#25556E
oklch(42.8% 0.066 234)
-
Step 900
900
#234659
oklch(37.7% 0.052 234.2)
-
Step 950
950
#152934
oklch(26.9% 0.033 233.9)
#337699 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) | #65759B | 0.054 |
| Deuteranopia (no green cones) | #576B98 | 0.045 |
| Tritanopia (no blue cones) | #007F82 | 0.057 |
| Achromatopsia (no color) | #6F6F6F | 0.087 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #337699
#337699
oklch(53.8% 0.087 234.5)
- #95603B
#95603B
oklch(53.9% 0.086 54.7)
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 #337699, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Muted Blue #3B719F ΔE 0.020
- Dull Blue #49759C ΔE 0.021
- Cerulean #457B9D ΔE 0.024
- Sea Blue #047495 ΔE 0.025
- Flat Blue #3C73A8 ΔE 0.029
- Metallic Blue #4F738E ΔE 0.029
- Ocean #017B92 ΔE 0.029
- Ocean Blue #03719C ΔE 0.029
Use #337699 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.