#315FBC
Closest named color: Mid Blue (#276AB3). oklch(50.5% 0.155 262.5), rgb(49, 95, 188).
Aa
White text reads best on this color (6.01:1).
About this color
#315FBC is a medium-dark, vivid blue. In OKLCH its lightness is 51%, its chroma 0.155 and its hue 262°. Its hue sits on the cool side of the wheel. The nearest named color is Mid Blue (#276AB3), ΔE 0.035 away. White text reads best on it, at 6.01:1.
| Hue family | Blues |
| Lightness | medium-dark (51%) |
| Chroma | vivid (0.155) |
| Temperature | cool |
| Nearest name | Mid Blue (#276AB3) |
| Black text | 3.49:1 |
| White text | 6.01:1 |
Values
| HEX | #315FBC |
| RGB | rgb(49, 95, 188) |
| HSL | hsl(220, 59%, 46%) |
| OKLCH | oklch(50.5% 0.155 262.5) |
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 #315FBC | 6.01:1 | AA | Lc -84.8 | Fine for body text |
| Black text on #315FBC | 3.49:1 | AA large text | Lc 24.4 | Dividers and decoration only |
| #315FBC text on white | 6.01:1 | AA | Lc 79.6 | Fine for body text |
| #315FBC text on black | 3.49:1 | AA large text | Lc -22.2 | 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
#F2F6FC
oklch(97.2% 0.009 258.3)
-
Step 100
100
#E2EAF9
oklch(93.5% 0.022 263.2)
-
Step 200
200
#CBDAF6
oklch(88.6% 0.042 263)
-
Step 300
300
#A7C1F2
oklch(80.9% 0.075 262.9)
-
Step 400
400
#78A0EC
oklch(70.8% 0.12 262.5)
-
Step 500
500
#5586E5
oklch(63.1% 0.153 262.3)
-
Step 600
600
#3B6DD3
oklch(55.5% 0.167 262.6)
-
Step 700
700 (this color)
#315FBC
oklch(50.5% 0.155 262.5)
-
Step 800
800
#264B94
oklch(42.8% 0.128 262.2)
-
Step 900
900
#233F76
oklch(37.7% 0.1 262.3)
-
Step 950
950
#152545
oklch(26.9% 0.064 262.8)
#315FBC 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) | #296ABF | 0.029 |
| Deuteranopia (no green cones) | #005DBA | 0.027 |
| Tritanopia (no blue cones) | #007584 | 0.123 |
| Achromatopsia (no color) | #636363 | 0.155 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #315FBC
#315FBC
oklch(50.5% 0.155 262.5)
- #825E00
#825E00
oklch(50.6% 0.104 82.4)
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 #315FBC, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Mid Blue #276AB3 ΔE 0.035
- French Blue #436BAD ΔE 0.049
- Warm Blue #4B57DB ΔE 0.059
- Iris #6258C4 ΔE 0.062
- Royal Blue #4169E1 ΔE 0.065
- Denim Blue #3B5B92 ΔE 0.066
- Dusky Blue #475F94 ΔE 0.067
- Windows Blue #3778BF ΔE 0.069
Use #315FBC 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.