#398BFB
Closest named color: Dodger Blue (#1E90FF). oklch(64.5% 0.185 257.3), rgb(57, 139, 251).
Aa
Black text reads best on this color (6.26:1).
About this color
#398BFB is a medium-light, vivid blue. In OKLCH its lightness is 64%, its chroma 0.185 and its hue 257°. Its hue sits on the cool side of the wheel. The nearest named color is Dodger Blue (#1E90FF), ΔE 0.016 away. Black text reads best on it, at 6.26:1.
| Hue family | Blues |
| Lightness | medium-light (64%) |
| Chroma | vivid (0.185) |
| Temperature | cool |
| Nearest name | Dodger Blue (#1E90FF) |
| Black text | 6.26:1 |
| White text | 3.35:1 |
Values
| HEX | #398BFB |
| RGB | rgb(57, 139, 251) |
| HSL | hsl(215, 96%, 60%) |
| OKLCH | oklch(64.5% 0.185 257.3) |
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 #398BFB | 3.35:1 | AA large text | Lc -66.0 | Content text, not long reading |
| Black text on #398BFB | 6.26:1 | AA | Lc 43.5 | Non-text elements, placeholder text |
| #398BFB text on white | 3.35:1 | AA large text | Lc 60.5 | Content text, not long reading |
| #398BFB text on black | 6.26:1 | AA | Lc -41.2 | 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
#F0F6FE
oklch(97.1% 0.012 255.5)
-
Step 100
100
#DFEBFC
oklch(93.6% 0.026 257)
-
Step 200
200
#C5DBFB
oklch(88.5% 0.05 257.7)
-
Step 300
300
#9CC3FB
oklch(80.9% 0.09 257.4)
-
Step 400
400
#63A1F9
oklch(70.6% 0.145 257.3)
-
Step 500
500 (this color)
#398BFB
oklch(64.5% 0.185 257.3)
-
Step 600
600
#006DE5
oklch(55.6% 0.201 257.4)
-
Step 700
700
#005BC2
oklch(49% 0.177 257.5)
-
Step 800
800
#004BA0
oklch(42.8% 0.152 257.1)
-
Step 900
900
#0E3F80
oklch(37.7% 0.121 257.5)
-
Step 950
950
#0A264B
oklch(27.1% 0.076 256.8)
#398BFB 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) | #5096FF | 0.036 |
| Deuteranopia (no green cones) | #2484F9 | 0.024 |
| Tritanopia (no blue cones) | #00A6B7 | 0.142 |
| Achromatopsia (no color) | #8C8C8C | 0.185 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #398BFB
#398BFB
oklch(64.5% 0.185 257.3)
- #BA8100
#BA8100
oklch(64.4% 0.134 77.6)
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 #398BFB, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dodger Blue #1E90FF ΔE 0.016
- Chefchaouen Blue #4895EF ΔE 0.037
- Dark Sky Blue #448EE4 ΔE 0.037
- Soft Blue #6488EA ΔE 0.043
- Clear Blue #247AFD ΔE 0.048
- Cornflower Blue #6495ED ΔE 0.054
- Cornflower #6A79F7 ΔE 0.058
- Water Blue #0E87CC ΔE 0.076
Use #398BFB 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.