#037ABE
Closest named color: Nice Blue (#107AB0). oklch(55.9% 0.137 244.2), rgb(3, 122, 190).
Aa
White text reads best on this color (4.63:1).
About this color
#037ABE is a medium-dark, moderately saturated blue. In OKLCH its lightness is 56%, its chroma 0.137 and its hue 244°. Its hue sits on the cool side of the wheel. The nearest named color is Nice Blue (#107AB0), ΔE 0.022 away. White text reads best on it, at 4.63:1.
| Hue family | Blues |
| Lightness | medium-dark (56%) |
| Chroma | moderately saturated (0.137) |
| Temperature | cool |
| Nearest name | Nice Blue (#107AB0) |
| Black text | 4.53:1 |
| White text | 4.63:1 |
Values
| HEX | #037ABE |
| RGB | rgb(3, 122, 190) |
| HSL | hsl(202, 97%, 38%) |
| OKLCH | oklch(55.9% 0.137 244.2) |
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 #037ABE | 4.63:1 | AA | Lc -77.0 | Fine for body text |
| Black text on #037ABE | 4.53:1 | AA | Lc 32.5 | Non-text elements, placeholder text |
| #037ABE text on white | 4.63:1 | AA | Lc 71.5 | Content text, not long reading |
| #037ABE text on black | 4.53:1 | AA | Lc -30.1 | Non-text elements, placeholder text |
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
#F1F6FB
oklch(97.1% 0.009 247.9)
-
Step 100
100
#E0EBF5
oklch(93.5% 0.018 245.4)
-
Step 200
200
#C7DCEF
oklch(88.5% 0.035 245.5)
-
Step 300
300
#9FC6E6
oklch(80.9% 0.062 243.3)
-
Step 400
400
#68A7DA
oklch(70.6% 0.099 244.3)
-
Step 500
500
#3A90D0
oklch(63.1% 0.126 244.5)
-
Step 600
600 (this color)
#037ABE
oklch(55.9% 0.137 244.2)
-
Step 700
700
#0066A0
oklch(49.2% 0.121 244)
-
Step 800
800
#005384
oklch(42.6% 0.106 244.3)
-
Step 900
900
#10456A
oklch(37.6% 0.083 244.4)
-
Step 950
950
#0C293E
oklch(27.1% 0.052 243.5)
#037ABE 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) | #597DC1 | 0.058 |
| Deuteranopia (no green cones) | #3F6EBD | 0.040 |
| Tritanopia (no blue cones) | #008B93 | 0.095 |
| Achromatopsia (no color) | #757575 | 0.138 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #037ABE
#037ABE
oklch(55.9% 0.137 244.2)
- #A66100
#A66100
oklch(55.8% 0.126 64)
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 #037ABE, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Nice Blue #107AB0 ΔE 0.022
- Windows Blue #3778BF ΔE 0.023
- Water Blue #0E87CC ΔE 0.040
- Flat Blue #3C73A8 ΔE 0.041
- Mid Blue #276AB3 ΔE 0.044
- Steel Blue #4682B4 ΔE 0.048
- French Blue #436BAD ΔE 0.050
- Muted Blue #3B719F ΔE 0.052
Use #037ABE 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.