#315FC9
Closest named color: Warm Blue (#4B57DB). oklch(51.5% 0.173 263.7), rgb(49, 95, 201).
Aa
White text reads best on this color (5.81:1).
About this color
#315FC9 is a medium-dark, vivid blue. In OKLCH its lightness is 51%, its chroma 0.173 and its hue 264°. Its hue sits on the cool side of the wheel. The nearest named color is Warm Blue (#4B57DB), ΔE 0.043 away. White text reads best on it, at 5.81:1.
| Hue family | Blues |
| Lightness | medium-dark (51%) |
| Chroma | vivid (0.173) |
| Temperature | cool |
| Nearest name | Warm Blue (#4B57DB) |
| Black text | 3.61:1 |
| White text | 5.81:1 |
Values
| HEX | #315FC9 |
| RGB | rgb(49, 95, 201) |
| HSL | hsl(222, 61%, 49%) |
| OKLCH | oklch(51.5% 0.173 263.7) |
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 #315FC9 | 5.81:1 | AA | Lc -83.9 | Fine for body text |
| Black text on #315FC9 | 3.61:1 | AA large text | Lc 25.4 | Dividers and decoration only |
| #315FC9 text on white | 5.81:1 | AA | Lc 78.6 | Fine for body text |
| #315FC9 text on black | 3.61:1 | AA large text | Lc -23.2 | 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
#F2F6FD
oklch(97.2% 0.01 261.8)
-
Step 100
100
#E2EAFB
oklch(93.6% 0.025 265.6)
-
Step 200
200
#CADAF9
oklch(88.6% 0.046 263.7)
-
Step 300
300
#A5C1F8
oklch(81% 0.084 263.6)
-
Step 400
400
#759EF4
oklch(70.6% 0.134 263.9)
-
Step 500
500
#5283F0
oklch(63% 0.172 263.9)
-
Step 600
600
#386ADE
oklch(55.6% 0.186 263.8)
-
Step 700
700 (this color)
#315FC9
oklch(51.5% 0.173 263.7)
-
Step 800
800
#24489C
oklch(42.6% 0.143 263.9)
-
Step 900
900
#223E7C
oklch(37.8% 0.111 263.7)
-
Step 950
950
#142549
oklch(27.2% 0.071 263.4)
#315FC9 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) | #116DCD | 0.037 |
| Deuteranopia (no green cones) | #005FC7 | 0.025 |
| Tritanopia (no blue cones) | #00798B | 0.136 |
| Achromatopsia (no color) | #656565 | 0.173 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #315FC9
#315FC9
oklch(51.5% 0.173 263.7)
- #846100
#846100
oklch(51.5% 0.106 83.8)
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 #315FC9, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Warm Blue #4B57DB ΔE 0.043
- Royal Blue #4169E1 ΔE 0.048
- Mid Blue #276AB3 ΔE 0.048
- Azul #1D5DEC ΔE 0.055
- Iris #6258C4 ΔE 0.060
- Neon Blue #4361EE ΔE 0.061
- French Blue #436BAD ΔE 0.062
- Cerulean Blue #056EEE ΔE 0.065
Use #315FC9 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.