#317AAE
Closest named color: Nice Blue (#107AB0). oklch(55.8% 0.108 243.2), rgb(49, 122, 174).
Aa
White text reads best on this color (4.64:1).
About this color
#317AAE is a medium-dark, moderately saturated blue. In OKLCH its lightness is 56%, its chroma 0.108 and its hue 243°. Its hue sits on the cool side of the wheel. The nearest named color is Nice Blue (#107AB0), ΔE 0.016 away. White text reads best on it, at 4.64:1.
| Hue family | Blues |
| Lightness | medium-dark (56%) |
| Chroma | moderately saturated (0.108) |
| Temperature | cool |
| Nearest name | Nice Blue (#107AB0) |
| Black text | 4.52:1 |
| White text | 4.64:1 |
Values
| HEX | #317AAE |
| RGB | rgb(49, 122, 174) |
| HSL | hsl(205, 56%, 44%) |
| OKLCH | oklch(55.8% 0.108 243.2) |
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 #317AAE | 4.64:1 | AA | Lc -77.4 | Fine for body text |
| Black text on #317AAE | 4.52:1 | AA | Lc 32.1 | Non-text elements, placeholder text |
| #317AAE text on white | 4.64:1 | AA | Lc 71.9 | Content text, not long reading |
| #317AAE text on black | 4.52:1 | AA | Lc -29.7 | 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
#F2F6FA
oklch(97.1% 0.007 247.9)
-
Step 100
100
#E2EBF3
oklch(93.6% 0.015 244.7)
-
Step 200
200
#CBDCEA
oklch(88.6% 0.027 242.8)
-
Step 300
300
#A6C5DE
oklch(80.9% 0.049 242.6)
-
Step 400
400
#76A7CE
oklch(70.8% 0.078 243.1)
-
Step 500
500
#5090C1
oklch(63.1% 0.099 243.4)
-
Step 600
600 (this color)
#317AAE
oklch(55.8% 0.108 243.2)
-
Step 700
700
#226695
oklch(49.1% 0.101 243.2)
-
Step 800
800
#1F5379
oklch(42.6% 0.084 243.9)
-
Step 900
900
#1F4561
oklch(37.6% 0.065 243)
-
Step 950
950
#132939
oklch(27.1% 0.041 242)
#317AAE 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) | #627BB0 | 0.050 |
| Deuteranopia (no green cones) | #516FAD | 0.040 |
| Tritanopia (no blue cones) | #00878C | 0.078 |
| Achromatopsia (no color) | #757575 | 0.108 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #317AAE
#317AAE
oklch(55.8% 0.108 243.2)
- #A06425
#A06425
oklch(55.8% 0.109 63)
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 #317AAE, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Nice Blue #107AB0 ΔE 0.016
- Flat Blue #3C73A8 ΔE 0.020
- Windows Blue #3778BF ΔE 0.029
- Muted Blue #3B719F ΔE 0.030
- Cerulean #457B9D ΔE 0.031
- Steel Blue #4682B4 ΔE 0.032
- Dull Blue #49759C ΔE 0.032
- Stormy Blue #507B9C ΔE 0.039
Use #317AAE 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.