#398AEA
Closest named color: Dark Sky Blue (#448EE4). oklch(63.2% 0.164 254.8), rgb(57, 138, 234).
Aa
Black text reads best on this color (5.99:1).
About this color
#398AEA is a medium-light, vivid blue. In OKLCH its lightness is 63%, its chroma 0.164 and its hue 255°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Sky Blue (#448EE4), ΔE 0.018 away. Black text reads best on it, at 5.99:1.
| Hue family | Blues |
| Lightness | medium-light (63%) |
| Chroma | vivid (0.164) |
| Temperature | cool |
| Nearest name | Dark Sky Blue (#448EE4) |
| Black text | 5.99:1 |
| White text | 3.50:1 |
Values
| HEX | #398AEA |
| RGB | rgb(57, 138, 234) |
| HSL | hsl(213, 81%, 57%) |
| OKLCH | oklch(63.2% 0.164 254.8) |
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 #398AEA | 3.50:1 | AA large text | Lc -67.6 | Content text, not long reading |
| Black text on #398AEA | 5.99:1 | AA | Lc 41.9 | Non-text elements, placeholder text |
| #398AEA text on white | 3.50:1 | AA large text | Lc 62.2 | Content text, not long reading |
| #398AEA text on black | 5.99:1 | AA | Lc -39.5 | 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
#F1F6FD
oklch(97.1% 0.011 256.7)
-
Step 100
100
#E0EBFA
oklch(93.6% 0.024 256.1)
-
Step 200
200
#C6DBF7
oklch(88.5% 0.045 255.6)
-
Step 300
300
#9EC4F4
oklch(81% 0.08 254.5)
-
Step 400
400
#67A3EF
oklch(70.7% 0.128 255)
-
Step 500
500 (this color)
#398AEA
oklch(63.2% 0.164 254.8)
-
Step 600
600
#0871D8
oklch(55.6% 0.179 254.9)
-
Step 700
700
#005FB8
oklch(49.1% 0.16 254.6)
-
Step 800
800
#034D98
oklch(42.6% 0.139 255.1)
-
Step 900
900
#114179
oklch(37.7% 0.108 255.2)
-
Step 950
950
#0C2747
oklch(27.1% 0.068 254.6)
#398AEA 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) | #5B92EE | 0.039 |
| Deuteranopia (no green cones) | #3D82E8 | 0.021 |
| Tritanopia (no blue cones) | #00A1AE | 0.127 |
| Achromatopsia (no color) | #898989 | 0.164 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #398AEA
#398AEA
oklch(63.2% 0.164 254.8)
- #B87C00
#B87C00
oklch(63.2% 0.133 75.1)
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 #398AEA, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Sky Blue #448EE4 ΔE 0.018
- Dodger Blue #1E90FF ΔE 0.033
- Chefchaouen Blue #4895EF ΔE 0.033
- Soft Blue #6488EA ΔE 0.038
- Cornflower Blue #6495ED ΔE 0.052
- Water Blue #0E87CC ΔE 0.052
- Clear Blue #247AFD ΔE 0.056
- Cornflower #6A79F7 ΔE 0.064
Use #398AEA 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.