#337188
Closest named color: Sea Blue (#047495). oklch(51.8% 0.073 225.3), rgb(51, 113, 136).
Aa
White text reads best on this color (5.44:1).
About this color
#337188 is a medium-dark, moderately saturated teal or cyan. In OKLCH its lightness is 52%, its chroma 0.073 and its hue 225°. 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 5.44:1.
| Hue family | Teals and cyans |
| Lightness | medium-dark (52%) |
| Chroma | moderately saturated (0.073) |
| Temperature | cool |
| Nearest name | Sea Blue (#047495) |
| Black text | 3.85:1 |
| White text | 5.44:1 |
Values
| HEX | #337188 |
| RGB | rgb(51, 113, 136) |
| HSL | hsl(196, 45%, 37%) |
| OKLCH | oklch(51.8% 0.073 225.3) |
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 #337188 | 5.44:1 | AA | Lc -82.3 | Fine for body text |
| Black text on #337188 | 3.85:1 | AA large text | Lc 27.1 | Dividers and decoration only |
| #337188 text on white | 5.44:1 | AA | Lc 77.0 | Fine for body text |
| #337188 text on black | 3.85:1 | AA large text | Lc -24.8 | 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
#F2F6F8
oklch(97.1% 0.005 228.8)
-
Step 100
100
#E3EBEF
oklch(93.5% 0.01 228.9)
-
Step 200
200
#CCDCE3
oklch(88.5% 0.02 225.7)
-
Step 300
300
#A9C6D2
oklch(80.9% 0.036 224.7)
-
Step 400
400
#7AA9BB
oklch(70.8% 0.057 223.7)
-
Step 500
500
#5693AB
oklch(63.1% 0.073 225.4)
-
Step 600
600
#397D96
oklch(55.6% 0.078 225.1)
-
Step 700
700 (this color)
#337188
oklch(51.8% 0.073 225.3)
-
Step 800
800
#255668
oklch(42.7% 0.06 225)
-
Step 900
900
#234755
oklch(37.7% 0.048 225.6)
-
Step 950
950
#162A31
oklch(27.1% 0.029 222.4)
#337188 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) | #646F89 | 0.056 |
| Deuteranopia (no green cones) | #586688 | 0.049 |
| Tritanopia (no blue cones) | #007878 | 0.045 |
| Achromatopsia (no color) | #6A6A6A | 0.073 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #337188
#337188
oklch(51.8% 0.073 225.3)
- #8B5B44
#8B5B44
oklch(51.8% 0.072 46.3)
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 #337188, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Sea Blue #047495 ΔE 0.027
- Metallic Blue #4F738E ΔE 0.032
- Ocean #017B92 ΔE 0.033
- Deep Aqua #08787F ΔE 0.035
- Ocean Blue #03719C ΔE 0.037
- Muted Blue #3B719F ΔE 0.039
- Dull Blue #49759C ΔE 0.041
- Deep Turquoise #017374 ΔE 0.044
Use #337188 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.