#1F70AA
Closest named color: Flat Blue (#3C73A8). oklch(52.7% 0.118 245.1), rgb(31, 112, 170).
Aa
White text reads best on this color (5.30:1).
About this color
#1F70AA is a medium-dark, moderately saturated blue. In OKLCH its lightness is 53%, its chroma 0.118 and its hue 245°. Its hue sits on the cool side of the wheel. The nearest named color is Flat Blue (#3C73A8), ΔE 0.024 away. White text reads best on it, at 5.30:1.
| Hue family | Blues |
| Lightness | medium-dark (53%) |
| Chroma | moderately saturated (0.118) |
| Temperature | cool |
| Nearest name | Flat Blue (#3C73A8) |
| Black text | 3.95:1 |
| White text | 5.30:1 |
Values
| HEX | #1F70AA |
| RGB | rgb(31, 112, 170) |
| HSL | hsl(205, 69%, 39%) |
| OKLCH | oklch(52.7% 0.118 245.1) |
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 #1F70AA | 5.30:1 | AA | Lc -81.4 | Fine for body text |
| Black text on #1F70AA | 3.95:1 | AA large text | Lc 28.1 | Dividers and decoration only |
| #1F70AA text on white | 5.30:1 | AA | Lc 76.0 | Fine for body text |
| #1F70AA text on black | 3.95:1 | AA large text | Lc -25.7 | 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
#E2EBF4
oklch(93.6% 0.016 248)
-
Step 200
200
#CADCEC
oklch(88.6% 0.029 244.9)
-
Step 300
300
#A5C5E1
oklch(80.9% 0.053 244.9)
-
Step 400
400
#73A6D2
oklch(70.6% 0.085 245.4)
-
Step 500
500
#4B90C7
oklch(63.2% 0.109 244.8)
-
Step 600
600 (this color)
#1F70AA
oklch(52.7% 0.118 245.1)
-
Step 700
700
#1C659A
oklch(49% 0.11 245.3)
-
Step 800
800
#1A537D
oklch(42.7% 0.091 244.9)
-
Step 900
900
#1C4565
oklch(37.7% 0.072 245)
-
Step 950
950
#12283B
oklch(26.9% 0.045 246.6)
#1F70AA 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) | #5572AC | 0.049 |
| Deuteranopia (no green cones) | #4166A9 | 0.035 |
| Tritanopia (no blue cones) | #007E85 | 0.083 |
| Achromatopsia (no color) | #6B6B6B | 0.118 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #1F70AA
#1F70AA
oklch(52.7% 0.118 245.1)
- #985A00
#985A00
oklch(52.6% 0.118 65.3)
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 #1F70AA, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Flat Blue #3C73A8 ΔE 0.024
- Mid Blue #276AB3 ΔE 0.025
- Ocean Blue #03719C ΔE 0.026
- Muted Blue #3B719F ΔE 0.026
- Nice Blue #107AB0 ΔE 0.028
- French Blue #436BAD ΔE 0.030
- Sea Blue #047495 ΔE 0.040
- Peacock Blue #016795 ΔE 0.043
Use #1F70AA 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.