#375DDE
Closest named color: Warm Blue (#4B57DB). oklch(53% 0.201 266.7), rgb(55, 93, 222).
Aa
White text reads best on this color (5.55:1).
About this color
#375DDE is a medium-dark, vivid blue. In OKLCH its lightness is 53%, its chroma 0.201 and its hue 267°. Its hue sits on the cool side of the wheel. The nearest named color is Warm Blue (#4B57DB), ΔE 0.024 away. White text reads best on it, at 5.55:1.
| Hue family | Blues |
| Lightness | medium-dark (53%) |
| Chroma | vivid (0.201) |
| Temperature | cool |
| Nearest name | Warm Blue (#4B57DB) |
| Black text | 3.78:1 |
| White text | 5.55:1 |
Values
| HEX | #375DDE |
| RGB | rgb(55, 93, 222) |
| HSL | hsl(226, 72%, 54%) |
| OKLCH | oklch(53% 0.201 266.7) |
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 #375DDE | 5.55:1 | AA | Lc -82.5 | Fine for body text |
| Black text on #375DDE | 3.78:1 | AA large text | Lc 26.9 | Dividers and decoration only |
| #375DDE text on white | 5.55:1 | AA | Lc 77.2 | Fine for body text |
| #375DDE text on black | 3.78:1 | AA large text | Lc -24.6 | 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 600.
-
Step 50
50
#F2F5FE
oklch(97% 0.012 271.3)
-
Step 100
100
#E2EAFC
oklch(93.6% 0.026 266.6)
-
Step 200
200
#CAD9FB
oklch(88.5% 0.05 266.5)
-
Step 300
300
#A6BFFC
oklch(80.8% 0.091 267.1)
-
Step 400
400
#779CFB
oklch(70.7% 0.145 266.6)
-
Step 500
500
#5680F8
oklch(63.1% 0.185 266.6)
-
Step 600
600 (this color)
#375DDE
oklch(53% 0.201 266.7)
-
Step 700
700
#3153C9
oklch(49.1% 0.187 266.9)
-
Step 800
800
#2845A2
oklch(42.7% 0.154 266.6)
-
Step 900
900
#243B81
oklch(37.7% 0.122 266.8)
-
Step 950
950
#15234B
oklch(26.9% 0.076 266.7)
#375DDE 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) | #0070E2 | 0.048 |
| Deuteranopia (no green cones) | #0061DB | 0.028 |
| Tritanopia (no blue cones) | #007D94 | 0.158 |
| Achromatopsia (no color) | #686868 | 0.202 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #375DDE
#375DDE
oklch(53% 0.201 266.7)
- #876600
#876600
oklch(52.9% 0.108 86.3)
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 #375DDE, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Warm Blue #4B57DB ΔE 0.024
- Azul #1D5DEC ΔE 0.028
- Neon Blue #4361EE ΔE 0.030
- Royal Blue #4169E1 ΔE 0.033
- Cerulean Blue #056EEE ΔE 0.047
- Bright Blue #0165FC ΔE 0.052
- Dark Periwinkle #665FD1 ΔE 0.062
- Electric Blue #0652FF ΔE 0.063
Use #375DDE 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.