#356E8B
Closest named color: Sea Blue (#047495). oklch(51.2% 0.075 233), rgb(53, 110, 139).
Aa
White text reads best on this color (5.59:1).
About this color
#356E8B is a medium-dark, moderately saturated blue. In OKLCH its lightness is 51%, its chroma 0.075 and its hue 233°. Its hue sits on the cool side of the wheel. The nearest named color is Sea Blue (#047495), ΔE 0.027 away. White text reads best on it, at 5.59:1.
| Hue family | Blues |
| Lightness | medium-dark (51%) |
| Chroma | moderately saturated (0.075) |
| Temperature | cool |
| Nearest name | Sea Blue (#047495) |
| Black text | 3.75:1 |
| White text | 5.59:1 |
Values
| HEX | #356E8B |
| RGB | rgb(53, 110, 139) |
| HSL | hsl(200, 45%, 38%) |
| OKLCH | oklch(51.2% 0.075 233) |
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 #356E8B | 5.59:1 | AA | Lc -83.1 | Fine for body text |
| Black text on #356E8B | 3.75:1 | AA large text | Lc 26.3 | Dividers and decoration only |
| #356E8B text on white | 5.59:1 | AA | Lc 77.8 | Fine for body text |
| #356E8B text on black | 3.75:1 | AA large text | Lc -24.0 | 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
#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
#AAC5D5
oklch(80.8% 0.037 233.9)
-
Step 400
400
#7CA7BF
oklch(70.6% 0.058 233.1)
-
Step 500
500
#5991AF
oklch(63% 0.074 233.1)
-
Step 600
600
#3D7B9B
oklch(55.5% 0.081 233.3)
-
Step 700
700 (this color)
#356E8B
oklch(51.2% 0.075 233)
-
Step 800
800
#28556C
oklch(42.8% 0.062 233.1)
-
Step 900
900
#254657
oklch(37.7% 0.048 232.5)
-
Step 950
950
#162933
oklch(26.9% 0.031 232.5)
#356E8B 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) | #606D8C | 0.049 |
| Deuteranopia (no green cones) | #54648B | 0.043 |
| Tritanopia (no blue cones) | #007678 | 0.052 |
| Achromatopsia (no color) | #686868 | 0.075 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #356E8B
#356E8B
oklch(51.2% 0.075 233)
- #895A3C
#895A3C
oklch(51.2% 0.076 52.8)
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 #356E8B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Sea Blue #047495 ΔE 0.027
- Ocean Blue #03719C ΔE 0.032
- Muted Blue #3B719F ΔE 0.033
- Metallic Blue #4F738E ΔE 0.033
- Denim #3B638C ΔE 0.034
- Dull Blue #49759C ΔE 0.039
- Ocean #017B92 ΔE 0.040
- Peacock Blue #016795 ΔE 0.041
Use #356E8B 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.