#339FCB
Closest named color: Turquoise Blue (#06B1C4). oklch(66.1% 0.115 229.8), rgb(51, 159, 203).
Aa
Black text reads best on this color (6.96:1).
About this color
#339FCB is a medium-light, moderately saturated teal or cyan. In OKLCH its lightness is 66%, its chroma 0.115 and its hue 230°. Its hue sits on the cool side of the wheel. The nearest named color is Turquoise Blue (#06B1C4), ΔE 0.056 away. Black text reads best on it, at 6.96:1.
| Hue family | Teals and cyans |
| Lightness | medium-light (66%) |
| Chroma | moderately saturated (0.115) |
| Temperature | cool |
| Nearest name | Turquoise Blue (#06B1C4) |
| Black text | 6.96:1 |
| White text | 3.01:1 |
Values
| HEX | #339FCB |
| RGB | rgb(51, 159, 203) |
| HSL | hsl(197, 60%, 50%) |
| OKLCH | oklch(66.1% 0.115 229.8) |
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 #339FCB | 3.01:1 | AA large text | Lc -61.9 | Content text, not long reading |
| Black text on #339FCB | 6.96:1 | AA | Lc 47.5 | Large or bold text, headings |
| #339FCB text on white | 3.01:1 | AA large text | Lc 56.5 | Large or bold text, headings |
| #339FCB text on black | 6.96:1 | AA | Lc -45.2 | Large or bold text, headings |
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
#F1F6FA
oklch(97.1% 0.008 241.7)
-
Step 100
100
#DFECF3
oklch(93.5% 0.017 230.9)
-
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
#61ABCE
oklch(70.7% 0.09 230.3)
-
Step 500
500 (this color)
#339FCB
oklch(66.1% 0.115 229.8)
-
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
#004861
oklch(37.6% 0.075 229.8)
-
Step 950
950
#072A39
oklch(26.9% 0.048 231)
#339FCB 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) | #889DCD | 0.079 |
| Deuteranopia (no green cones) | #748ECA | 0.068 |
| Tritanopia (no blue cones) | #00ABAE | 0.066 |
| Achromatopsia (no color) | #949494 | 0.115 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #339FCB
#339FCB
oklch(66.1% 0.115 229.8)
- #CA7C4F
#CA7C4F
oklch(66% 0.114 49.8)
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 #339FCB, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Turquoise Blue #06B1C4 ΔE 0.056
- Faded Blue #658CBB ΔE 0.060
- Greyblue #77A1B5 ΔE 0.065
- Dark Sky Blue #448EE4 ΔE 0.068
- Cadet Blue #5F9EA0 ΔE 0.069
- Chefchaouen Blue #4895EF ΔE 0.069
- Blue NCS #118AB2 ΔE 0.069
- Water Blue #0E87CC ΔE 0.074
Use #339FCB 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.