#366598
Closest named color: Denim (#3B638C). oklch(49.8% 0.097 252), rgb(54, 101, 152).
Aa
White text reads best on this color (6.04:1).
About this color
#366598 is a medium-dark, moderately saturated blue. In OKLCH its lightness is 50%, its chroma 0.097 and its hue 252°. Its hue sits on the cool side of the wheel. The nearest named color is Denim (#3B638C), ΔE 0.019 away. White text reads best on it, at 6.04:1.
| Hue family | Blues |
| Lightness | medium-dark (50%) |
| Chroma | moderately saturated (0.097) |
| Temperature | cool |
| Nearest name | Denim (#3B638C) |
| Black text | 3.47:1 |
| White text | 6.04:1 |
Values
| HEX | #366598 |
| RGB | rgb(54, 101, 152) |
| HSL | hsl(211, 48%, 40%) |
| OKLCH | oklch(49.8% 0.097 252) |
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 #366598 | 6.04:1 | AA | Lc -85.2 | Fine for body text |
| Black text on #366598 | 3.47:1 | AA large text | Lc 24.0 | Dividers and decoration only |
| #366598 text on white | 6.04:1 | AA | Lc 80.0 | Fine for body text |
| #366598 text on black | 3.47:1 | AA large text | Lc -21.8 | 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 700.
-
Step 50
50
#F2F6FA
oklch(97.1% 0.007 247.9)
-
Step 100
100
#E4EBF3
oklch(93.7% 0.013 251.6)
-
Step 200
200
#CDDBEA
oklch(88.5% 0.026 250)
-
Step 300
300
#ABC3DF
oklch(80.8% 0.048 252.4)
-
Step 400
400
#7EA4CF
oklch(70.7% 0.076 252)
-
Step 500
500
#5D8DC2
oklch(63.1% 0.096 251.8)
-
Step 600
600
#4376AE
oklch(55.6% 0.104 252.1)
-
Step 700
700 (this color)
#366598
oklch(49.8% 0.097 252)
-
Step 800
800
#2C517A
oklch(42.7% 0.081 252.4)
-
Step 900
900
#284362
oklch(37.6% 0.063 252.8)
-
Step 950
950
#182839
oklch(27.1% 0.038 250.8)
#366598 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) | #4F689A | 0.031 |
| Deuteranopia (no green cones) | #425E97 | 0.022 |
| Tritanopia (no blue cones) | #007177 | 0.079 |
| Achromatopsia (no color) | #636363 | 0.097 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #366598
#366598
oklch(49.8% 0.097 252)
- #845816
#845816
oklch(49.7% 0.097 71.9)
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 #366598, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Denim #3B638C ΔE 0.019
- Dusky Blue #475F94 ΔE 0.023
- Denim Blue #3B5B92 ΔE 0.028
- Peacock Blue #016795 ΔE 0.029
- Muted Blue #3B719F ΔE 0.036
- Ocean Blue #03719C ΔE 0.039
- French Blue #436BAD ΔE 0.039
- Light Navy Blue #2E5A88 ΔE 0.040
Use #366598 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.