#339EC9
Closest named color: Turquoise Blue (#06B1C4). oklch(65.8% 0.114 229.4), rgb(51, 158, 201).
Aa
Black text reads best on this color (6.87:1).
About this color
#339EC9 is a medium-light, moderately saturated teal or cyan. In OKLCH its lightness is 66%, its chroma 0.114 and its hue 229°. Its hue sits on the cool side of the wheel. The nearest named color is Turquoise Blue (#06B1C4), ΔE 0.057 away. Black text reads best on it, at 6.87:1.
| Hue family | Teals and cyans |
| Lightness | medium-light (66%) |
| Chroma | moderately saturated (0.114) |
| Temperature | cool |
| Nearest name | Turquoise Blue (#06B1C4) |
| Black text | 6.87:1 |
| White text | 3.05:1 |
Values
| HEX | #339EC9 |
| RGB | rgb(51, 158, 201) |
| HSL | hsl(197, 60%, 49%) |
| OKLCH | oklch(65.8% 0.114 229.4) |
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 #339EC9 | 3.05:1 | AA large text | Lc -62.4 | Content text, not long reading |
| Black text on #339EC9 | 6.87:1 | AA | Lc 47.0 | Large or bold text, headings |
| #339EC9 text on white | 3.05:1 | AA large text | Lc 57.0 | Large or bold text, headings |
| #339EC9 text on black | 6.87:1 | AA | Lc -44.7 | Non-text elements, placeholder text |
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 500.
-
Step 50
50
#F1F6F9
oklch(97% 0.007 233.6)
-
Step 100
100
#E0ECF3
oklch(93.6% 0.016 233)
-
Step 200
200
#C5DEEA
oklch(88.6% 0.031 228.2)
-
Step 300
300
#9CC8DE
oklch(80.9% 0.056 229.9)
-
Step 400
400
#61ABCD
oklch(70.6% 0.089 229.6)
-
Step 500
500 (this color)
#339EC9
oklch(65.8% 0.114 229.4)
-
Step 600
600
#007EA7
oklch(55.5% 0.111 230)
-
Step 700
700
#006A8D
oklch(49.1% 0.098 229.8)
-
Step 800
800
#005774
oklch(42.7% 0.085 229.4)
-
Step 900
900
#014861
oklch(37.6% 0.074 229.9)
-
Step 950
950
#072A39
oklch(26.9% 0.048 231)
#339EC9 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) | #889CCB | 0.080 |
| Deuteranopia (no green cones) | #748DC8 | 0.069 |
| Tritanopia (no blue cones) | #00AAAC | 0.066 |
| Achromatopsia (no color) | #939393 | 0.114 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #339EC9
#339EC9
oklch(65.8% 0.114 229.4)
- #C97B4F
#C97B4F
oklch(65.7% 0.114 49.3)
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 #339EC9, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Turquoise Blue #06B1C4 ΔE 0.057
- Faded Blue #658CBB ΔE 0.058
- Greyblue #77A1B5 ΔE 0.065
- Blue NCS #118AB2 ΔE 0.066
- Cadet Blue #5F9EA0 ΔE 0.067
- Dark Sky Blue #448EE4 ΔE 0.068
- Chefchaouen Blue #4895EF ΔE 0.070
- Dusty Blue #5A86AD ΔE 0.071
Use #339EC9 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.