#398FD4
Closest named color: Dark Sky Blue (#448EE4). oklch(63% 0.132 246.4), rgb(57, 143, 212).
Aa
Black text reads best on this color (6.05:1).
About this color
#398FD4 is a medium-light, moderately saturated blue. In OKLCH its lightness is 63%, its chroma 0.132 and its hue 246°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Sky Blue (#448EE4), ΔE 0.027 away. Black text reads best on it, at 6.05:1.
| Hue family | Blues |
| Lightness | medium-light (63%) |
| Chroma | moderately saturated (0.132) |
| Temperature | cool |
| Nearest name | Dark Sky Blue (#448EE4) |
| Black text | 6.05:1 |
| White text | 3.46:1 |
Values
| HEX | #398FD4 |
| RGB | rgb(57, 143, 212) |
| HSL | hsl(207, 64%, 53%) |
| OKLCH | oklch(63% 0.132 246.4) |
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 #398FD4 | 3.46:1 | AA large text | Lc -67.4 | Content text, not long reading |
| Black text on #398FD4 | 6.05:1 | AA | Lc 42.2 | Non-text elements, placeholder text |
| #398FD4 text on white | 3.46:1 | AA large text | Lc 61.9 | Content text, not long reading |
| #398FD4 text on black | 6.05:1 | AA | Lc -39.8 | 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
#F1F6FB
oklch(97.1% 0.009 247.9)
-
Step 100
100
#E0EBF6
oklch(93.5% 0.019 248)
-
Step 200
200
#C7DCF0
oklch(88.5% 0.036 246.9)
-
Step 300
300
#9FC5E9
oklch(80.8% 0.065 247.2)
-
Step 400
400
#68A7DE
oklch(70.8% 0.104 246.3)
-
Step 500
500 (this color)
#398FD4
oklch(63% 0.132 246.4)
-
Step 600
600
#0178C2
oklch(55.6% 0.144 246.5)
-
Step 700
700
#0065A4
oklch(49.2% 0.127 246.3)
-
Step 800
800
#005287
oklch(42.6% 0.111 246.5)
-
Step 900
900
#10456C
oklch(37.8% 0.086 245.7)
-
Step 950
950
#0C283F
oklch(26.8% 0.055 246.6)
#398FD4 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) | #6F92D7 | 0.053 |
| Deuteranopia (no green cones) | #5A83D3 | 0.039 |
| Tritanopia (no blue cones) | #00A0A8 | 0.096 |
| Achromatopsia (no color) | #8A8A8A | 0.132 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #398FD4
#398FD4
oklch(63% 0.132 246.4)
- #BE7719
#BE7719
oklch(63.1% 0.132 66.6)
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 #398FD4, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Sky Blue #448EE4 ΔE 0.027
- Water Blue #0E87CC ΔE 0.034
- Chefchaouen Blue #4895EF ΔE 0.044
- Cool Blue #4984B8 ΔE 0.046
- Faded Blue #658CBB ΔE 0.051
- Steel Blue #4682B4 ΔE 0.053
- Soft Blue #6488EA ΔE 0.057
- Cornflower Blue #6495ED ΔE 0.058
Use #398FD4 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.