#3957D8
Closest named color: Warm Blue (#4B57DB). oklch(51.5% 0.2 268.3), rgb(57, 87, 216).
Aa
White text reads best on this color (5.95:1).
About this color
#3957D8 is a medium-dark, vivid blue. In OKLCH its lightness is 51%, its chroma 0.200 and its hue 268°. Its hue sits on the cool side of the wheel. The nearest named color is Warm Blue (#4B57DB), ΔE 0.021 away. White text reads best on it, at 5.95:1.
| Hue family | Blues |
| Lightness | medium-dark (51%) |
| Chroma | vivid (0.200) |
| Temperature | cool |
| Nearest name | Warm Blue (#4B57DB) |
| Black text | 3.52:1 |
| White text | 5.95:1 |
Values
| HEX | #3957D8 |
| RGB | rgb(57, 87, 216) |
| HSL | hsl(229, 67%, 54%) |
| OKLCH | oklch(51.5% 0.2 268.3) |
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 #3957D8 | 5.95:1 | AA | Lc -84.4 | Fine for body text |
| Black text on #3957D8 | 3.52:1 | AA large text | Lc 24.9 | Dividers and decoration only |
| #3957D8 text on white | 5.95:1 | AA | Lc 79.2 | Fine for body text |
| #3957D8 text on black | 3.52:1 | AA large text | Lc -22.6 | Dividers and decoration only |
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 700.
-
Step 50
50
#F2F5FF
oklch(97.1% 0.014 272.7)
-
Step 100
100
#E2EAFD
oklch(93.7% 0.027 267.5)
-
Step 200
200
#CAD9FE
oklch(88.6% 0.054 267.9)
-
Step 300
300
#A7BFFF
oklch(81% 0.095 268.4)
-
Step 400
400
#799AFF
oklch(70.6% 0.153 268.6)
-
Step 500
500
#587DFF
oklch(63.1% 0.197 268.3)
-
Step 600
600
#4061EF
oklch(55.5% 0.216 268.3)
-
Step 700
700 (this color)
#3957D8
oklch(51.5% 0.2 268.3)
-
Step 800
800
#2A42A8
oklch(42.7% 0.166 268.2)
-
Step 900
900
#253985
oklch(37.6% 0.13 268.3)
-
Step 950
950
#16224E
oklch(26.9% 0.083 268.8)
#3957D8 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) | #006BDC | 0.050 |
| Deuteranopia (no green cones) | #005CD6 | 0.032 |
| Tritanopia (no blue cones) | #00788F | 0.159 |
| Achromatopsia (no color) | #646464 | 0.201 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3957D8
#3957D8
oklch(51.5% 0.2 268.3)
- #806300
#806300
oklch(51.4% 0.105 88.5)
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 #3957D8, closest first.
No curated palette has a color within ΔE 0.04 of #3957D8.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Warm Blue #4B57DB ΔE 0.021
- Azul #1D5DEC ΔE 0.037
- Neon Blue #4361EE ΔE 0.043
- Royal Blue #4169E1 ΔE 0.047
- Iris #6258C4 ΔE 0.062
- Cerulean Blue #056EEE ΔE 0.063
- Blue Blue #2242C7 ΔE 0.063
- Dark Periwinkle #665FD1 ΔE 0.065
Use #3957D8 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.